01 -
Bring a large pot of water to a boil. Add cauliflower florets and cook, covered, for 8 to 10 minutes until fork-tender. Reserve 1 cup of the cooking water.
02 -
Heat olive oil in a large skillet over medium heat. Add minced shallot, garlic, and crushed red pepper flakes. Sauté for 1 to 2 minutes until garlic is soft and fragrant without browning.
03 -
Transfer cooked cauliflower to the skillet. Season with salt and white pepper. Cook for 1 minute to meld flavors.
04 -
Transfer cauliflower mixture to a blender along with reserved cooking water and milk. Cover blender vent with a thin kitchen towel for ventilation. Puree until smooth and creamy, approximately 1 minute. Add additional water, milk, or olive oil if needed to adjust consistency.
05 -
Combine the Alfredo sauce with cooked fettuccine until evenly coated. Serve immediately.