Vegetable Spaghetti Bake

Ingredients

• 8 ounces uncooked spaghetti (whole-wheat works well)
• 28 ounces meatless spaghetti sauce, divided
• 1 cup zucchini, cut into 1/2 &quot,pieces
• 1/2 cup green pepper, chopped
• 1 cup celery, sliced
• 1 cup carrot, thinly sliced
• 1 cup mushroom, thinly sliced
• 1 medium onion, chopped
• 1 tablespoon oil
• 2 cups fat-free cottage cheese
• 2 cups part-skim mozzarella cheese, shredded
• 2 tablespoons parmesan cheese, grated