Cheesy Vegetable Lasagna

Name: Cheesy Vegetable Lasagna
Ingredients: 12 lasagna noodles; 2 tablespoons olive oil; 2 heads fresh broccoli, chopped; 2 carrots, thinly sliced; 1 large onion, chopped; 2 green bell peppers, chopped; 2 small zucchini, sliced; 3 cloves garlic, minced; 0.5 cup all-purpose flour; 3 cups milk; 0.75 cup Parmesan cheese, divided; 0.5 teaspoon salt; 0.5 teaspoon pepper; 1 (10 ounce) package frozen chopped spinach, thawed; 1 (8 ounce) container small curd cottage cheese; 24 ounces ricotta cheese; 2.5 cups shredded mozzarella cheese, divided