Heat a skillet or griddle over medium-high heat
Add ground beef to the pan
Season with salt, black pepper, garlic powder, and onion powder
Chop and break up the beef while it cooks
Cook until browned and fully cooked
Add sliced onions if desired and cook until softened
Push the beef into a pile and place sliced cheese on top
Let the cheese melt into the beef
Chop and mix the beef and cheese together
Split and toast a hero roll or hoagie roll
Add lettuce, tomato, and condiments if desired
Fill the roll with the chopped cheese mixture
Serve immediately