BLT Ranch Burgers

Name: BLT Ranch Burgers
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; 8 pieces cooked bacon, cut in half; 1 ripe tomato, sliced; Bibb lettuce leaves; 4 potato buns, buttered and toasted