Cheeseburger Stuffed Pasta Shells

• 18 uncooked jumbo pasta shells
• 1-1/2 pounds lean ground beef (90% lean)
• 1 medium onion, chopped
• 1 can (8 ounces) tomato sauce
• 1/2 cup ketchup
• 1/4 cup prepared mustard
• 1/4 teaspoon pepper
• 1-1/2 cups shredded cheddar cheese, divided

1. Preheat oven to 350u0b0. Cook pasta according to package directions. Drain and rinse in cold water; drain again.
2. Meanwhile, in a large skillet, cook beef and onion over medium-high heat until beef is no longer pink, 6-8 minutes, breaking beef into crumbles; drain. Stir in tomato sauce, ketchup, mustard and pepper until blended. Stir in 3/4 cup shredded cheese.
3. Spoon about 2 tablespoons filling into each shell. Place in a greased 11x7-in. baking dish.
4. Bake, covered, until heated through, 12-15 minutes. Sprinkle with remaining cheese; bake, uncovered, until cheese is melted, about 5 minutes. If desired, serve with optional toppings.
5. Cool unbaked casserole; cover and freeze. To use, partially thaw in refrigerator overnight. Remove from refrigerator 30 minutes before baking. Preheat oven to 350u0b0. Cover casserole with foil; bake as directed, increasing time as necessary to heat through and for a thermometer inserted in center to read 165u0b0. If desired, serve with optional toppings.

pasta shells, lean ground beef, onion, tomato sauce, ketchup, prepared mustard, pepper, cheddar cheese

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