Recipes: Best-ever burger

Preparation:  Preparation time: 5 mins  Cooking time: 15 mins  Serving: 3 Ingredients: 1 lb. ground beef Kosher salt Freshly ground black pepper 3 slices cheese, such as yellow cheddar     For Serving 3 hamburger buns 1 large tomato, thinly sliced 1 small red onion, thinly sliced 3 leaves butter or iceberg lettuce Ketchup Mustard Mayonnaise Instructions: Shape...