Garden-Style Lasagna

INGREDIENTS

Cooking spray

2 cups

chopped onion

garlic cloves, minced

2 tsp

olive oil, divided

2 cups

chopped zucchini (about 8 ounces)

2 cups

chopped yellow squash (about 8 ounces)

2 cups

thinly sliced carrot (about 8 ounces)

2 cups

chopped broccoli (about 6 ounces)

1 tsp

salt, divided

1/2 cup

all-purpose flour (about 2 1/4 ounces)

3 1/2 cups

1% low-fat milk

1 cup

grated fresh Parmesan cheese, divided

1/4 tsp

freshly ground black pepper

nutmeg

1 10 ounce package

frozen chopped spinach, thawed and drained

1 1/2 cups

1% low-fat cottage cheese

2 cups

preshredded part-skim mozzarella cheese, divided

precooked lasagna noodles, divided