Preheat your oven to 350 F.

Spray an 8" x 8" baking dish with non-stick spray.

Separate the egg whites and yokes into two bowls.

Whisk the whites until they just get foamy. Do not whisk until they foam completely. Less is more in this case.

Pour the egg whites into the dish and cover with foil.

Bake for 20 minutes or a few minutes more until the eggs have set. Remove from the oven and let cool.

Whisk the yokes until smooth.

Spray a skillet with non-stick spray and add the yolks. Scramble until cooked.

Transfer the yolks to a food processor. Add the mayonnaise, vinegar, mustard, and a pinch of salt and pepper and process until very smooth.

Transfer to a pastry bag with a round tip or dessert decorator.

Remove the cooked eggs whites from the baking dish and cut into squares, or use a small cookie cutter to cut into circles.

Pipe the egg yolk mixture onto each egg white.

Sprinkle with paprika and chives.