Preheat broiler to low

Slice tomatoes

Slice bread length-wise

Cut cheese slices into triangles

In mixing bowl, combine meat, parmesan cheese, salt, onion powder, garlic powder, oregano, and tomato paste

Slice open bread

Broil 5 inches from heat for 12 minutes under preheated broiler, or until meat is done

Remove from oven

Alternate tomatoes and cheese slices over cooked mixture

Broil 2 minutes more or until cheese melts

Serve