Easy Beef-Stuffed Shells

• 20 uncooked jumbo pasta shells
• 1 pound ground beef
• 1 large onion, chopped
• 1 carton (15 ounces) ricotta cheese
• 2 cups shredded Italian cheese blend, divided
• 1/2 cup grated Parmesan cheese
• 1/4 cup prepared pesto
• 1 large egg
• 1 jar (26 ounces) spaghetti sauce, divided

1. Cook pasta shells according to package directions to al dente; drain and rinse in cold water. In a large skillet, cook beef and onion over medium heat until meat is no longer pink; drain. In a large bowl, combine the ricotta cheese, 1-1/2 cups Italian cheese blend, Parmesan cheese, pesto, egg and half of the beef mixture.
2. Spread 3/4 cup spaghetti sauce into a greased 13x9-in. baking dish. Spoon cheese mixture into pasta shells; place in baking dish. Combine remaining beef mixture and spaghetti sauce; pour over shells. Sprinkle with remaining cheese. Cover and refrigerate overnight.
3. Remove from the refrigerator 30 minutes before baking. Cover and bake at 350u0b0 for 40 minutes. Uncover; bake 5-10 minutes longer or until cheese is melted.

pasta shells, ground beef, onion, ricotta cheese, italian cheese blend, parmesan cheese, pesto, egg, spaghetti sauce

Taken from www.tasteofhome.com/recipes/easy-beef-stuffed-shells/ (may not work)