Classic Beef Burger with All the Fixins

Method

1. Heat olive oil in a skillet over medium-high heat.
2. Form beef into a patty and cook for 3-4 minutes per side for medium-rare.
3. Toast the bun in the skillet or under the broiler.
4. Spread ketchup, mustard, and mayonnaise on the bun.
5. Assemble the burger with lettuce, tomato, and onion.
6. Check that the ground meat reaches 71°C (160°F) throughout before serving.