- 1 (12 ounce) package jumbo pasta shells
 - 4 skinless, boneless chicken breast halves – cubed
 - 1 onion, chopped
 - 1 egg
 - 1 cup dry bread crumbs
 - 1/2 teaspoon dried oregano
 - 1/2 teaspoon dried basil
 - salt and pepper to taste
 - 8 ounces shredded mozzarella cheese
 - 8 ounces shredded Cheddar cheese
 - 1 (29 ounce) can tomato sauce
 
- Preheat oven to 350 degrees F (175 degrees C). Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain. Separate shells and let stand, so they are not touching, on waxed paper or foil.
 - In large skillet over medium heat, combine chicken, onion, egg and bread crumbs. Cook until chicken is no longer pink. Season with oregano, basil, salt and pepper. Stir in three-quarters of the shredded mozzarella and cheddar; cook until cheeses melt.
 - Fill shells with chicken mixture, using a tablespoon, and place in a 9 x 13 baking dish. Cover the shells with the tomato sauce and top with the reserved cheese. Cover with foil and bake 45 minutes, or until lightly browned and bubbly.