Beef burger with bacon and cheese

Cut the tomatoes into 16 slices. Peel the red onion and cut it into thin rings. Cook the bacon until golden brown on both sides on a medium-hot grill or in a pan, then set aside.

Form the meat into 4 patties, matching the size of the buns. Season both sides with salt and pepper, and brush with melted butter. Place on a medium-hot grill and cook for 3 minutes. Then flip the meat, brush again with butter, and cook for another 2 minutes. Finally, place a slice of cheese on each patty and cook for 1 more minute until the cheese melts. Transfer the cooked patties to a plate.

Cut the hamburger buns in half and toast them cut-side down on the grill.