Creamy Ricotta Beef Stuffed Shells - A Comforting Dinner Delight - Quickie Recipe

Ingredients

• 20 large pasta shells.
• 1 lb lean ground beef.
• 1 cup ricotta cheese.
• 1 ½ cups shredded mozzarella cheese, divided.
• ½ cup grated Pecorino Romano cheese.
• 1 large egg, beaten.
• 2 ½ cups tomato basil sauce.
• 1 tsp dried oregano.
• 2 cloves garlic, minced.
• Salt and black pepper, to taste.
• Fresh parsley, chopped (for garnish).