Steam cauliflower until soft, then blend together with spices, nutritional yeast, dijon mustard, lemon juice and cashew butter until smooth and creamy.
Meanwhile, cook pasta according to package directions, chop carrot and preheat oven to 180 degrees Celsius.
Once cooked and drained, combine pasta with cauliflower sauce, chopped carrot and peas, then spoon into a glass casserole dish and sprinkle with some extra nutritional yeast.
Bake in the oven for about 30 minutes or until golden on top.