Butternut Squash Mac and Cheese

INGREDIENTS

1 1/2 cups

Butternut squash

package Macaroni or cavatappi, whole wheat cooked

Sea salt and freshly ground black pepper

1 tbsp

Butter or butter alternative, organic

1 cup

Cheddar, part-skim sharp grated

3 tbsp

Greek yogurt, nonfat

1/2 cup

Gruyere cheese, grated

1 cup

Milk, low-fat organic