Ingredients

• 1 (16 ounce) package spaghetti
• 1 pound ground beef
• 1 onion, chopped
• 1 (32 ounce) jar meatless spaghetti sauce
• 1/2 teaspoon seasoned salt
• 2 eggs
• 1/3 cup grated Parmesan cheese
• 5 tablespoons butter, melted
• 2 cups small curd cottage cheese, divided
• 4 cups shredded mozzarella cheese, divided