This is creamy stovetop polenta topped with oven-roasted mushrooms seasoned with tamari, garlic, thyme, and a finish of lemon zest. The whole thing comes together in 50 minutes, and most of that time the oven and the pot are doing the work for you. It’s a genuinely satisfying weeknight dinner that also holds up at a dinner party without any extra effort.
Before you start
Two things will make or break this recipe. First, whisk the cornmeal into already-simmering liquid in a slow, steady stream while stirring constantly — dump it in all at once and you get lumps that are nearly impossible to smooth out later. Second, don’t crowd the mushrooms on the baking sheet. They need space to roast and brown; pile them up and they steam instead, turning soft and waterlogged rather than caramelized at the edges. If your baking sheet is on the smaller side, split the mushrooms across two sheets rather than squeezing them onto one.
Troubleshooting
- Polenta seized up and went stiff before serving: It thickens fast off the heat. Stir in a splash of hot water or warm plant milk — a few tablespoons at a time — over low heat until it loosens back to a pourable consistency.
- Polenta tastes flat or bland: Salt the cooking liquid before the cornmeal goes in, not after. Cornmeal absorbs seasoning as it cooks; adding salt at the end never fully catches up.
- Mushrooms released a lot of liquid and look pale: Your oven likely didn’t fully preheat, or the pan was cold when the mushrooms went in. Always put the pan in the oven during preheat so it’s hot when the mushrooms hit it.
- Nutritional yeast flavor is too strong or slightly bitter: Pull back the amount by a tablespoon and add a small squeeze of lemon juice instead — it gives a similar savory brightness without the intensity.
- Polenta has a gritty texture even after the full cook time: Some coarser stone-ground cornmeal needs an extra 5–10 minutes. Keep the heat at a low simmer, stir every minute or two, and taste again — the grittiness will cook out.
Storage and reheating
Store leftover polenta and mushrooms separately if you can — polenta absorbs moisture from the mushrooms and gets gluey when stored together. Polenta keeps in the fridge for up to 4 days in a sealed container; it will firm into a solid slab, which is fine. To reheat, break it into chunks in a small saucepan with a splash of plant milk or water, warm over medium-low heat, and stir until smooth — about 5 minutes. Mushrooms reheat well in a dry skillet over medium heat for 3–4 minutes, which brings back some of the edge you got from roasting. Skip reheating them in the microwave if you can; they go rubbery. Polenta can also be frozen for up to 2 months: slice the cold slab, freeze flat on a tray, then transfer to a bag. Reheat from frozen in a covered saucepan with a little liquid over low heat, stirring occasionally.
Creamy Vegan Polenta with Roasted Mushrooms
Equipment
- Oven
- rimmed baking sheet
- Parchment paper or silicone baking mat
- Large mixing bowl
- Chef's knife
- Cutting board
- Measuring cups and spoons
- Heavy-bottomed 3- to 4-quart saucepan
- Whisk
- Wooden spoon or silicone spatula
- Ladle
- Microplane or fine grater
- Tongs (optional)
Ingredients
For the Roasted Mushrooms:
- 1.5 lb mixed mushrooms (cremini, oyster, shiitake), cleaned and torn/sliced choose firm, fresh mushrooms; a mix adds texture and flavor contrast
- 2 tbsp extra-virgin olive oil a robust, peppery EVOO complements earthy mushrooms
- 1 tbsp tamari (or soy sauce) low-sodium preferred; tamari keeps it gluten-free
- 1 tsp balsamic vinegar aged balsamic adds subtle sweetness and depth
- 3 cloves garlic, minced freshly minced for the most fragrance
- 1 tsp fresh thyme leaves or use 1/2 tsp dried thyme if fresh is unavailable
- 0.5 tsp smoked paprika (optional) adds a gentle smokiness that flatters the mushrooms
- 0.5 tsp kosher salt Diamond Crystal preferred; adjust if using table salt
- 0.25 tsp freshly ground black pepper freshly ground for a brighter aroma
For the Creamy Polenta:
- 4 cups low-sodium vegetable broth use a clean, savory broth; I love a clear, not sweet profile
- 1 cup unsweetened plant milk (oat or almond) oat milk for extra creaminess; almond for lighter body
- 0.5 tsp kosher salt season the cooking liquid so flavor infuses each grain
- 1 cup medium-grind yellow cornmeal (polenta), stone-ground preferred stone-ground gives better flavor and texture
- 1 tbsp extra-virgin olive oil or vegan butter butter for plush richness; EVOO for peppery brightness
- 2 tbsp nutritional yeast adds savory, cheesy depth without dairy
- 0.25 tsp white pepper (or black pepper) white pepper keeps the color golden
For Finishing & Garnish:
- 1 tbsp vegan butter (optional) fold in at the end for extra silkiness
- 1 tbsp fresh parsley, finely chopped flat-leaf parsley for clean, herbal lift
- 1 tsp lemon zest (from about 1/2 lemon) zest directly over the bowl to capture citrus oils
- 1 tsp truffle oil (optional) a few drops go a long way; use sparingly
- 0.25 tsp red pepper flakes for gentle heat and color contrast
Instructions
- Preheat and Prep: Position a rack in the center of the oven and preheat to 425°F (220°C). Line a rimmed baking sheet with parchment. Gently brush dirt from the mushrooms; tear larger caps into bite-size pieces for more browned edges.
- Marinate Mushrooms (10 minutes): In a large bowl, whisk together 2 tbsp olive oil, 1 tbsp tamari, 1 tsp balsamic, minced garlic, thyme, smoked paprika, 1/2 tsp salt, and 1/4 tsp pepper. Add mushrooms and toss until coated. Let stand 10 minutes; they’ll glisten and release a light, savory aroma.
- Roast: Spread mushrooms in a single layer on the prepared sheet. Roast at 425°F (220°C) for 18 minutes, stir, then continue 4–7 minutes more until edges are crisp and browned and centers are tender. For extra char, broil on high for 1–2 minutes, watching closely. Transfer mushrooms and any pan juices back to the bowl and tent loosely to keep warm.
- Heat Polenta Liquid: In a heavy-bottomed saucepan, combine 4 cups broth, 1 cup plant milk, and 1/2 tsp salt. Bring to a bare simmer over medium heat (tiny bubbles and steam; ~5–7 minutes). Keep the liquid hot but not boiling to prevent scorching.
- Whisk in Cornmeal: While whisking constantly, rain in 1 cup cornmeal in a thin, steady stream to prevent lumps. When it begins to thicken (30–60 seconds), reduce heat to low. Tip: If a few small lumps form, whisk briskly; as a last resort, a brief burst with an immersion blender will smooth it (texture becomes slightly finer).
- Slow-Simmer to Creamy (25–30 minutes): Switch to a wooden spoon and cook on low, stirring frequently and scraping the bottom and sides. The polenta is ready when it’s voluptuously creamy and the grains taste tender with no gritty core. If it thickens too much, ladle in a splash of hot water or broth to loosen.
- Enrich and Season: Stir in 1 tbsp olive oil or vegan butter, 2 tbsp nutritional yeast, and 1/4 tsp white pepper. Taste and adjust salt. For extra silkiness, whisk in the optional 1 tbsp vegan butter off heat.
- Finish Mushrooms & Plate: Toss warm mushrooms with chopped parsley, lemon zest, and truffle oil if using. Spoon polenta into warm bowls and tap to level; use the back of a spoon to create a glossy swirl. Mound mushrooms on top, drizzle pan juices, and finish with red pepper flakes and a crank of pepper. Serve immediately while steaming and fragrant.
- Cook Time Note: Roasting (22–25 minutes) and polenta (25–30 minutes) are done concurrently; total cook time is about 30 minutes.
Notes
Mary’s Tips:
- Mushroom Magic: Don’t overcrowd the pan—space invites crisp edges. If needed, use two sheets.
- Deeper Umami: Add 1 tsp white miso to the mushroom marinade for extra savoriness.
- Ultra-Creamy Polenta: Finish with a final splash of hot plant milk for a silky sheen.
- Substitutions: Use rosemary instead of thyme; swap balsamic for sherry vinegar; replace tamari with coconut aminos for soy-free.
- Grind Matters: Coarser polenta needs a few extra minutes and possibly more liquid—add in small splashes.
- Faster Browning: Pat mushrooms dry before marinating; surface moisture slows caramelization.
- Allergy Notes: For nut allergies, choose oat, soy, or rice milk.
Serving Suggestions:
- Plating: Swirl the polenta to a glossy pool of golden yellow, then crown with mahogany-brown mushrooms. Scatter bright green parsley and flecks of red pepper for color contrast.
- Sides: Pair with garlicky sautéed greens or a lemony arugula salad.
- Drinks: Try a vegan-friendly Tuscan red or a chilled herbal tea with citrus.
- Done Right Cues: Aroma is heady with thyme and garlic; polenta flows slowly from spoon; mushrooms have crisped edges and juicy centers.
Culinary Context:
Polenta hails from Northern Italy, where it’s served creamy or set and grilled. This vegan rendition leans on nutritional yeast and good olive oil to echo the richness of dairy. I first served this after a misty market morning in Milan—porcini in my bag and a craving for something warm and soulful.Optional Advanced Instructions:
- Make-Ahead Mushrooms: Roast up to 1 day ahead; rewarm at 400°F (205°C) for 6–8 minutes.
- Polenta Hold: Par-cook 20 minutes, then finish with hot liquid just before serving.
- Oven-Baked Polenta (hands-off): Combine liquids and cornmeal in an oven-safe pot; bake covered at 350°F (175°C) for 45 minutes, stirring once midway. Whisk in enrichments to finish.
- Beginner Alternative: Use instant polenta; cook per package, then enrich as directed. Texture will be finer and cook time shorter.
Timing:
Prep Time: 20 minutes (0 hr 20 min), including 10-minute mushroom marination.Cook Time: 30 minutes (0 hr 30 min) when roasting mushrooms and simmering polenta concurrently.
Total Time: 50 minutes (0 hr 50 min).
Nutrition
Frequently asked questions
Can I use instant polenta instead of stone-ground?
Yes, and it cuts the cook time down to about 5 minutes. The texture will be slightly smoother and less complex in flavor, but it works fine on a busy weeknight — skip the garnish on top if you’re going the fast route, not worth the extra dish.
What mushrooms work best if I can’t find a mix?
Cremini mushrooms alone are a completely reliable choice — they’re widely available, affordable, and roast well. Avoid button mushrooms if you can; they have a higher water content and tend to shrink down to almost nothing at high heat.
Can I make the polenta ahead of time?
You can make it up to 2 days ahead and refrigerate it as a firm slab. Reheat it on the stovetop with a splash of plant milk, stirring over medium-low heat until it’s creamy again — it comes back together in about 5 minutes.
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