Boil the eggs: Place eggs in a saucepan, cover with water, and bring to a boil. Once boiling, remove from heat, cover, and let sit for 10–12 minutes. Drain and transfer to an ice bath.
Peel and halve: Once cooled, peel eggs and slice in half. Remove yolks and place them in a bowl.
Mash the filling: Add avocado, mustard, lemon juice, chives, and yogurt (if using) to the yolks. Mash until smooth. Season with salt and pepper.
Fill the eggs: Pipe or spoon the mixture into the egg whites.
Garnish and serve: Top with a dash of smoked paprika, microgreens, or seeds for that perfect finishing touch.