Roasted Butternut Squash Gratin

INGREDIENTS

2 1/2

lbs peeled and cubed butternut squash

1 tbsp

olive oil

2 cloves

garlic, crushed

1/3 cup

finely chopped walnuts

2 tbsp

unsalted butter

1 1/2 tbsp

flour ((substitute 1 tbsp potato starch for gluten free))

1/2 tsp

salt (or more to taste)

1/4 tsp

black pepper

1 1/4 cups

lowfat milk

3/4 cup

shredded Gruyère cheese, tightly packed

nutmeg