Select 12 large, intact iceberg lettuce leaves and gently separate them from the head. Rinse and pat completely dry with paper towels—this prevents the wraps from becoming soggy. Stack 2 leaves per serving (making 6 wraps total), slightly overlapping them to create a sturdy base for filling. Arrange the stacked leaves in your serving containers or on a platter.
Working efficiently, distribute the cubed oven-roasted turkey breast evenly across the lettuce wraps. Layer the sliced hard-boiled eggs on top, then add the diced cherry tomatoes. Arrange the avocado wedges last—I do this just before serving to prevent browning. Sprinkle the crumbled turkey bacon and blue cheese over each wrap for added flavor and texture.
Divide the red wine vinaigrette into small individual containers or drizzle directly over the wraps just before eating. I prefer serving the dressing on the side so guests can control how much they use and prevent the lettuce from wilting. Serve immediately while the lettuce is crisp and fresh.