Stromboli Sandwiches

I found a new favorite recipe - Stromboli Sandwiches. It's perfect for potlucks. We had our annual Webster Lake ward pool party - and I brought this dish. It was wonderful! Thanks Taste of Home!

2 lbs ground beef

1/4 cup fineley chopped onion

1 cup ketchup

1 cup tomato sauce

1/4 cup grated Parmesan cheese

2 tsp garlic powder, divided

1 tsp dried oregano

1/2 tsp fennel seed

1/2 tsp Italian seasoning

1/2 cup butter, softened

2 loaves Italian bread, halved lengthwise

2 cups shredded part-skim mozzarella cheese

Cook beef and onion over medium heat until meat is no longer pink; drain. Stir in the ketchup, tomato sauce, Parmesan cheese, 1/2 tsp garlic powder, oregano, fennel seed, and Italian seasoning. Bring to a boil. reduce heat; simmer, uncovered, for 15 min or until thickened, stirring occasionally. Meanwhile, in a small bowl, combine butter and remaining garlic powder; spread over top halves of bread. Sprinkle 1/2 cup mozzarella cheese over each bottom bread half. Spoon meat mixture over top; sprinkle with remaining mozzarella cheese. Replace bread tops; wrap each sandwich loaf in foil. Bake at 350 for 25-30 min or until cheese is melted.