1. Heat a grill or skillet over medium-high heat. Brush olive oil on the buns and toast them until golden brown.
2. Form the ground beef into patties and season with salt and pepper. Cook the patties on the grill or skillet until they reach your desired level of doneness.
3. Slice the tomatoes, cucumbers, lettuce, and onions.
4. Assemble the burgers by spreading mayonnaise on the bottom bun, then adding the patty, cheese, tomatoes, cucumbers, lettuce, onions, and mustard. Top with the other half of the bun.
| Calories | Protein | Carbs | Fat |
|---|---|---|---|
| 450 | 25g | 30g | 20g |
