Slice hard boiled eggs lenghwise. Remove yolks and add to bowl.
Combine mayonnaise, mustard, and avocado with egg yolks. Use a stand mixer with the paddle attachment to whip or even a fork will due. Season with salt and pepper to taste.
Spoon or pipe yolk mixture back into the egg whites. Garnish with chives, if desired. Serve cold.
Notes
Makes 24 deviled eggs. Serving size = 2 deviled eggs.