Stuffed Shells with Four Cheeses

Ingredients (10)

• + 1 (12 ounce) box jumbo pasta shells add to pantry
• ✓ 1 (16 ounce) package cottage cheese
• + 1 (15 ounce) container ricotta cheese add to pantry
• + 2 cups shredded mozzarella cheese, divided add to pantry
• + ½ cup shredded Parmesan cheese add to pantry
• + 1 egg add to pantry
• + 2 tablespoons chopped fresh parsley add to pantry
• + salt and ground black pepper to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• + 3 cups tomato sauce add to pantry