Better than a sloppy joe

I got this recipe for Stromboli sandwiches from my sister-in-law Joanne. It makes a really quick and easy weeknight dish, or as my sister-in-law has done, you can use it to serve a crowd. Either way, you'll be happy with the results. It's a tasty sandwich!

THE RECIPE:

1 lb. ground beef
1 Tbsp. finely chopped onion
1/2 c. tomato sauce
1/2 c. ketchup
3 Tbsp. grated Parmesan
1 1/2 tsp. garlic powder, plus more for sprinkling
1/4 tsp. oregano
6 large rolls or hoagies
Butter or spread
6 slices mozzarella cheese

Preheat oven to 350 degrees. In skillet, cook beef and onion. Drain excess fat if necessary/desired. Add tomato sauce, ketchup, Parmesan, garlic powder and oregano. Simmer until flavors have melded, up to 20 minutes.

Split each roll in half and butter both sides. Sprinkle with garlic powder. Spoon meat mixture onto one side, then top with a slice of mozzarella. Close roll, then wrap in foil and place in oven for about 15 minutes, or until cheese is melted.