Ingredients

• 1 cup (240 ml) mayonnaise
• 1/2 cup (120 ml) plain yogurt
• 1/4 cup (60 ml) buttermilk
• 2 tablespoons minced fresh chives
• 2 tablespoons minced fresh flat-leaf parsley
• 1/4 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 1/4 teaspoon garlic powder
• 1 pound (455 g) lean ground beef
• 1 tablespoon Worcestershire sauce
• 1 large egg, lightly beaten
• 1/2 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 8 pieces cooked bacon, cut in half
• 1 ripe tomato, sliced
• Bibb lettuce leaves
• 4 potato buns, buttered and toasted

Instructions

1. Make the dressing: Combine all the dressing ingredients and mix well. Refrigerate until ready to serve.
2. Make the burgers: Preheat an outdoor grill to medium-high.
3. In a bowl, combine the beef, Worcestershire sauce, egg, salt, and pepper. Shape into four patties.
4. Grill the patties for about 3 minutes per side for medium doneness.
5. Place each patty on a bun and top with bacon, tomato, lettuce, and a generous dollop of dressing. Close the burgers with the top bun half and serve immediately.