Combine mayonnaise, salt, pepper, red wine vinegar and garlic. Mix well and stir in crumbled blue cheese. Store in refrigerator until ready to use.
Heat grill to medium-high heat. Lightly oil grill grate. Combine beef, 2 tablespoons barbecue sauce, salt and pepper. Divide and shape mixture into 10 3/4?-thick patties. Grill for 2-3 minutes and then flip. Brush the top of each burger with remaining sauce. Continue grilling for another 2 minutes and flip burgers again, brushing the other side with additional sauce. Continue to cook and baste until internal temperature of the burger reach 160-165°F.
Lightly spread the bottom half of each roll with cheese spread and top with a lettuce leaf. Break each bacon piece in half and place on top of lettuce leaves. Place burger on top and drizzle with additional barbecue sauce if desired. Top with optional crispy shoestring onions. Spread remaining cheese spread on top halves of rolls. Makes 5 servings.
Approximate Nutrient Analysis per serving (not including optional crispy onions):
700 calories, 35 g fat, 12 g saturated fat, 125 mg cholesterol, 1500 mg sodium, 52 g carbohydrate, 2 g fiber, 19 g sugar, 43 g protein