Hard boil your eggs: Place eggs in a pot with enough water to cover the eggs. Bring the water to a boil, then take off of the heat and let sit with the lid on for 12 minutes. Remove eggs from water and place in ice water. Let sit another 10 minutes.
While eggs are boiling, cook the bacon and slice the tomato & lettuce.
Peel eggs and wash. Carefully slice the eggs in half length wise. Scoop out the yolks and place in a bowl.
Mash eggs with mayonnaise and Dijon mustard. Season with salt/pepper as needed.
Decide whether you want the top of the egg to be blue, or the bottom. Place half the egg in the cabbage dye and let it soak until desired color is absorbed, likely 5-10 minutes. gently dry with a paper towel.
Place the bottom of the egg down on a serving plate. Scoop the yolk mixture into the egg. Layer tomato slice, lettuce and bacon. Top with the top of the egg and carefully press a toothpick through the egg bite.
Sprinkle with sesame seeds and enjoy!