Ingredients

  • Cooking spray
  • 12 large eggs
  • 1/3 cup mayonnaise
  • 1 tablespoon white vinegar
  • 2 teaspoons yellow mustard
  • Kosher salt and freshly ground black pepper
  • Paprika and sliced chives, for garnish, optional

Method

  • Special equipment: a pastry bag fitted with a small round pastry tip
  • Preheat the oven to 350 degrees F. Coat an 8-inch square baking dish with cooking spray.
  • Separate the egg whites and yolks into 2 small bowls; set aside the yolks.
  • Whisk the whites until just foamy, transfer them to the prepared baking dish, cover the dish with foil and bake until the whites have fully set, about 20 minutes.
  • Let cool completely in the baking dish.
  • While the whites are baking, beat the yolks until smooth.
  • Lightly coat a medium nonstick skillet with cooking spray.
  • Add the yolks, and scramble over medium low until fully cooked and slightly dry, 4 to 5 minutes.
  • Transfer the yolks to a food processor.
  • Add the mayonnaise, vinegar, mustard, 1/4 teaspoon salt and a few grinds of pepper, and pulse until smooth and creamy.
  • Transfer the yolk mixture to a pastry bag fitted with a small round tip.
  • Turn the egg whites out of the baking dish onto a cutting board.
  • Cut into even 1-inch squares.
  • Pipe swirly dollops of the egg yolk onto each square.
  • Sprinkle each with paprika and chives if using.