All-Dressed Burgers

Ингредиенты

• ½ cup (125 ml) mayonnaise, store-bought or homemade
• 4 tsp (20 ml) ketchup
• 2 tsp (10 ml) mustard
• 1 lb (454 g) lean ground beef
• 1 tbsp (15 ml) olive oil
• 4 slices Swiss cheese (about 90 g)
• 4 hamburger buns
• 1 large tomato, cut into slices
• 1 ½ cups (375 ml) shredded iceberg lettuce
• Salt and pepper