Follow these simple steps to prepare Easy Duchess Potatoes:

1. Boil Potatoes: Place the peeled and chopped potatoes in a large pot of salted water. Bring to a boil and cook until tender, approximately 15-20 minutes.
2. Drain and Steam: Drain the potatoes thoroughly and return them to the pot. Allow them to steam for a few minutes to get rid of excess moisture.
3. Mash the Potatoes: Using a potato masher or ricer, mash the potatoes until they are smooth and free of lumps.
4. Mix in Butter and Cream: Stir in the softened butter and heavy cream until completely combined. Add the egg yolks, salt, pepper, and nutmeg (if using). Mix well until fully incorporated.
5. Preheat Oven: Preheat your oven to 400°F (200°C).
6. Pipe the Potatoes: Transfer the potato mixture to a piping bag fitted with a star tip. Pipe the mixture onto a baking sheet lined with parchment paper, forming small swirls.
7. Apply Egg Wash: Lightly beat the egg and brush it over the piped potatoes to give a golden finish during baking.
8. Bake in Oven: Bake for about 20-25 minutes, or until the edges are slightly crisp and the tops are golden brown.
9. Serve Warm: Remove from the oven and let cool for a few minutes before serving.

By following these steps, you will create Easy Duchess Potatoes that not only look professional but taste absolutely divine.