Slice the onion thinly lengthwise. Finely chop the garlic.
Heat some oil in a frying pan and sweat the onion over low-medium heat.
Push the onion to one side, add the beef and garlic, and sauté until the meat changes color.
When the beef changes color, sauté lightly together with the onion, and season with salt and pepper, being a bit generous with the pepper. Toast the bread at the same time.
Put the filling from Step 4 on a slice of toast, and top with cheese. Toast in the oven for about 30 seconds until the cheese melts, and it's done.
If you push the fillings in with chopsticks while folding the toast in half and wrapping it in paper, it's easy to eat.
Story Behind this Recipe
I couldn't forget the delicious cheesesteak sandwich I had at the baseball stadium in Philadelphia, so I recreated it quickly using ingredients I had on hand.
Real cheesesteak sandwiches vary from store to store such as the flavor of the bread, how well the onions are sautéed, but even if you just make it quickly without thinking about it too much, it's really tasty. You can use whatever bread you have. I think plain bread works best.