Chose yellow types of potatoes, as they will look better than white ones, as a final product.
Yellow potatoes- 1kg
Oil for baking.
Mash them add butter and return to the heat ( very low) keep on stirring for a minute. Add egg yolks, stir really well. Take off the heat. Let it cool a little.
Preheat the oven to 425/220.
Feel the piping bag with mashed potatoes.
Line the baking tray with a parchment paper, drizzle a little oil.
Make shapes of your liking and bake for 15-20 minutes.