Cut your onions and peppers.  For this application, I diced my onions into large dice and cut the green peppers into ½” diced squares. 

Melt the butter and saute your onions and pepper until the onions are translucent and the green peppers are softening. 

Add your hamburger patties to the griddles and season them with salt, pepper, and garlic powder. Let them sear on one side for two minutes before you use the side of your spatula or griddle scraper to chop the meat into small pieces. Try to keep the meat from each patty separated from the other patties so you can keep your servings the right size.

Once your meat has been chopped, combine it with some of the onions and peppers so that they can finish cooking together. Spread the chopped meat, onion, and pepper mixture around the griddle surface to ensure the maximum surface area gets brown and crispy.

Once everything is cooked, and getting brown and delicious, arrange your meat mixture in the shape of your hoagie roll and put two slices of American cheese on top and let melt.

Once the cheese is melted, and bubbling on the edges, add it to your hoagie roll and top with condiments. Traditional accompaniments include shredded iceberg lettuce, sliced tomatoes, ketchup, and mustard.