Ingredients:
1 lb ground beef (80/20 blend)
1 large onion, thinly sliced
Salt and pepper, to taste
4 slices of American cheese
4 hamburger buns
Butter, for toasting the buns
Pickles, for serving (optional)
Mustard, for serving (optional)
Instructions:
Prepare the Onions:
Thinly slice the onion using a mandoline or a sharp knife. The slices should be very thin, almost translucent.