Dr. Pepper Spaghetti Bake

2 pounds lean ground beef
1 cup chopped onion
1/2 teaspoon garlic powder
1/2 teaspoon Italian seasoning
1/2 teaspoon salt
1/2 teaspoon pepper
1 (12 ounce) can Dr. Pepper
2 (8 ounce) cans tomato sauce
2 tablespoons Worcestershire sauce
1 (16 ounce) package spaghetti, cooked
1 1/2 cup shredded mozzarella Cheese

Brown ground beef in a large Dutch oven. Drain well. Add onion and seasonings. Cook about 5 minutes. Add Dr. Pepper, tomato sauce and Worcestershire sauce and cook an additional 5 minutes.