01 -
Bring a large pot of water to a boil. Add cauliflower florets, cover, and cook for 8 to 10 minutes until tender. Reserve 1 cup of the cooking water before draining.
02 -
Heat olive oil in a large skillet over medium heat. Add minced shallot, garlic, and crushed red pepper flakes. Sauté until garlic is fragrant and soft, approximately 1 to 2 minutes, avoiding browning.
03 -
Transfer cooked cauliflower to the skillet with aromatics. Season with salt and white pepper, cooking for an additional minute to develop flavor.
04 -
Transfer the skillet mixture to a blender. Add reserved cooking water and milk. Cover the blender lid vent with a thin kitchen towel to allow steam to escape. Blend until smooth and creamy, about 1 minute, adding small amounts of water, milk, or olive oil if the sauce appears too thick.
05 -
Toss the prepared sauce with cooked fettuccine until evenly coated. Serve immediately.