Ingredients

• 2 teaspoons butter
• 1 potato hamburger bun
• 2 ounces ground beef
• salt and freshly ground black pepper to taste
• 1 slice onion
• 1 slice American cheese
• 1 tablespoon mayonnaise
• 2 teaspoons ketchup
• 0.5 teaspoons hot sauce
• 0.25 teaspoons fish sauce

Instructions

1. 1 Heat a heavy skillet or griddle over medium heat. Spread butter over top of bun and bottom of bottom bun and place in skillet. Press down firmly with a spatula to completely flatten buns. Cook until toasted on both sides and set aside.
2. 2 Increase the heat under the skillet to medium-high. Place meat in a mounded ball into the hot skillet and press firmly to flatten with a spatula. Gently work the spatula in a circular motion to form a very thin patty with jagged edges. Season with salt and pepper.
3. 3 Place onion on top and cook until browned around the edges. Top with cheese and cook until cheese melts. Scrape burger from the skillet and place on top of the bun top. Invert the other bun so that the inside of the bun is now the outside. Place burger back in skillet and cook about 1 minute on each side.
4. 4 Stir mayonnaise, ketchup, hot sauce, and fish sauce together in a small bowl. Serve sauce alongside the burger.

Nutrition per serving