Slow Cooker Vegetable Lasagna - Slow Cookers | BLACK + DECKER

Ingredients

• 2 Tbsp. oil
• 1 cup sliced zucchini
• 1 cup sliced yellow summer squash
• 1/2 lb. sliced fresh mushrooms
• 1/2 cup chopped onion
• 1 jar (24 oz.) spaghetti sauce
• 1 container (15 oz.) ricotta cheese
• 1 egg
• 1 pkg. (8 oz.) shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese, divided
• 8 uncooked lasagna noodles