Slow-roasted garlic, soaked cashews, and steamed cauliflower blend into a creamy sauce that coats fettuccine without any dairy. White miso and nutritional yeast build a savory, rounded finish, and a squeeze of lemon keeps it bright. The recipe is sized for two and takes about 50 minutes start to finish.
Roast the Garlic (35 minutes): Preheat the oven to 400°F (205°C). Place the trimmed garlic head on a small sheet of foil, drizzle with 1 teaspoon olive oil, and add a pinch of salt. Wrap tightly and set on a baking sheet. Roast for 35 minutes until the cloves are soft, lightly golden, and sweetly aromatic. Cool until safe to handle, then squeeze the cloves from their skins.Alternative: If you’re short on time, gently sauté 6–8 thinly sliced garlic cloves in 1 tablespoon olive oil over medium-low heat for 3–4 minutes until pale gold and fragrant (not brown), then proceed—flavor will be sharper but still delicious.
Quick-Soak Cashews (15 minutes): While the garlic roasts, cover cashews with boiling water and soak for 15 minutes. Drain well. Traditional method: Soak 4–8 hours in cool water and drain.
Steam the Cauliflower (5–7 minutes): Add 1 inch of water to a saucepan, fit a steamer basket, and bring to a boil over medium-high heat. Add florets, cover, and steam 5–7 minutes until very tender when pierced. Drain and pat dry to avoid watering down the sauce.
Cook the Pasta (8–10 minutes): Bring a large pot of water to a rolling boil. Salt with 1 tablespoon kosher salt (your water should taste like the sea). Add fettuccine and cook until al dente per package directions, 8–10 minutes. Reserve 3/4 cup hot pasta water, then drain.
Sauté the Mushrooms (Optional, 6–8 minutes): Heat a large skillet over medium-high. Add 1 tablespoon olive oil, then the sliced mushrooms in an even layer. Cook undisturbed 2–3 minutes to sear, then stir and continue 4–5 minutes until deeply browned and their edges crisp. Deglaze with 1 teaspoon tamari, add thyme and black pepper, toss, and set aside.
Blend the Alfredo: In a high-speed blender, combine drained cashews, roasted garlic cloves, steamed cauliflower, 1 1/2 cups cashew milk, nutritional yeast, white miso, lemon juice, 1/2 teaspoon kosher salt, and white pepper. Blend on high 60–90 seconds until completely silky. Sensory cue: The sauce should ribbon off a spoon like light custard. Thin with reserved pasta water, a splash at a time, until pourable yet rich.Alternative Tools: A food processor will work (sauce will be slightly less silky). An immersion blender can work if you pre-chop the cauliflower very fine.
Marry Pasta and Sauce (2–3 minutes): Return the drained pasta to the pot over low heat. Pour in enough Alfredo to generously coat (you may have a little extra). Toss continuously for 2–3 minutes, adding splashes of pasta water as needed for a glossy, restaurant-style sheen. Do not boil—gentle heat preserves the sauce’s velvety texture.
Plate with Intention: Twirl nests of fettuccine into warm bowls. Spoon mushrooms over the top. Finish with parsley, lemon zest, toasted pine nuts, a light drizzle of olive oil, and a few grinds of pepper. Serve immediately while steamy and aromatic.
Notes
Mary’s Tips:
Ultra-Smooth Sauce: Blend longer than you think—up to 90 seconds in a high-speed blender—for that fine-dining silk.
Umami Boosters: A splash of white wine in Step 7 (reduce briefly) or 1/2 teaspoon white truffle oil at the end elevates date-night vibes.
Nut-Free Option: Replace cashews with 1 cup silken tofu; use 1 cup oat milk instead of cashew milk. Blend thoroughly and adjust lemon/salt.
Gluten-Free: Use your favorite gluten-free fettuccine and swap tamari for soy sauce.
Faster Caramelized Mushrooms: Don’t crowd the pan; cook in two batches if needed for deeper browning.
Serving Suggestions:
Plate in warmed shallow bowls and twirl with tongs for elegant nests.
Garnish for Contrast: bright green parsley, sunny lemon zest, and pale ivory sauce with golden mushrooms—aroma of sweet garlic and thyme should bloom as it hits the table.
Pairings: A crisp, chilled Pinot Grigio or sparkling water with a lemon twist; a simple arugula salad with shaved fennel.
Culinary Context:
Alfredo’s roots are Italian, later embraced by Italian-American kitchens for its rich, creamy allure. This plant-based rendition honors that comforting spirit while leaning on Italian techniques—starchy pasta water, gentle emulsions, and fresh herbs—to achieve indulgence without dairy.
Optional Advanced Instructions:
Make-Ahead: The sauce can be blended up to 3 days in advance; refrigerate and reblend with a splash of hot pasta water just before serving. It also freezes well up to 1 month.
Parallel Prep: Roast garlic and quick-soak cashews while you steam cauliflower and set pasta water to boil to keep total time efficient.