01 -
Turn on your oven to 425°F. Get a baking tray ready by covering it with parchment paper.
02 -
Put the peeled and diced potatoes in a big pot. Cover them with cool water, bring to a boil, and cook until soft and easy to pierce with a fork (about 15–20 minutes). Drain well afterward.
03 -
Mash or rice the potatoes into a bowl so they’re smooth. Add in half the melted butter, cream, salt, pepper, and nutmeg. Mix until combined. Let it cool a bit, then add the egg yolks one at a time, stirring after each.
04 -
Scoop the potato mixture into a piping bag fitted with a big star tip. Pipe 12 swirls about 2½ inches wide and 2 inches tall onto the lined tray, leaving space in between. Brush the tops with the remaining butter.
05 -
Put the tray in the oven and bake for 20 minutes, or until the edges are golden and crisp. Sprinkle with parsley and serve while warm.