Vegetable Lasagna

Ingredients

• 1 large onion, finely chopped
• 1/2 lb. carrots, shredded
• 1 (4 1/2 oz.) jar sliced mushrooms, drained
• 2 c. small curd cottage cheese
• 2 eggs
• 1/4 c. grated Parmesan cheese
• 1 tsp. oregano
• 1 (15 1/2 oz.) jar spaghetti sauce, divided
• 6 lasagna noodles, cooked
• 1 (10 oz.) pkg. frozen chopped spinach
• 1/2 lb. tomatoes, peeled and chopped
• 2 c. Mozzarella cheese, shredded