01 - Place eggs in a saucepan and cover with cold water. Bring to a boil, then reduce heat and simmer for 9 minutes. Transfer to ice water bath to cool, then peel and chop.
02 - Cook bacon in a skillet over medium heat until crispy. Drain on paper towels and crumble once cooled.
03 - Combine chopped eggs, mayonnaise, Dijon mustard, halved cherry tomatoes, crumbled bacon, and chives if using. Season with salt and pepper to taste.
04 - Spoon the egg salad mixture evenly into the center of each lettuce leaf.
05 - Fold or roll up the lettuce wraps and serve immediately.