Mince the beef patty and shape it for a burger.
Sprinkle salt and pepper on the patty.
Add oil to the pan and grill the patty on both sides.
Top the patty with cheddar and mozzarella cheese and let them melt.
Cut the bun in half and lightly toast it in the pan.
Place lettuce, tomato, and the grilled patty on the bottom bun.
Cover with the top bun to finish.