Cauliflower Mac And Cheese

INGREDIENTS

1 lb

elbow macaroni or other pasta

1/2

head cauliflower, cut into florets

1 cup

skim milk

3/4 cup

sharp cheddar cheese, grated

1/3 cup

parmesan cheese, grated

1/4 cup

low-fat sour cream

1/2 tsp

garlic powder

1/8 tsp

ground nutmeg

kosher salt and freshly ground pepper,