01 -
Preheat the oven to 220°C. Line a baking sheet with parchment paper.
02 -
Place diced potatoes in a large pot, cover with cold water by 3–5 cm, and season with 15 g salt. Bring to a boil over medium-high heat, reduce to medium-low, cover, and simmer until very tender, 15–20 minutes. Drain thoroughly.
03 -
Meanwhile, dice 55 g butter. In a small saucepan, melt the diced butter over medium heat. Add minced garlic and sauté until lightly golden and softened, 1–2 minutes.
04 -
Remove the saucepan from heat, stir in 45 ml half and half, and transfer to a small bowl to prevent overcooking the garlic.
05 -
Transfer drained potatoes to a large mixing bowl. Mash thoroughly until smooth, or press through a potato ricer for a finer texture.
06 -
Add shredded parmesan and the warm garlic butter mixture to potatoes. Season with salt and freshly ground black pepper. Combine with a wooden spoon until even.
07 -
Allow the potato mixture to cool briefly. Stir in the egg yolks one at a time until fully incorporated. If the mixture is too thick, add up to 15 ml more half and half for desired consistency.
08 -
Transfer the mixture to a large piping bag fitted with a 2 cm star tip. Pipe 12 mounds onto the prepared baking sheet, spacing evenly and shaping each to approximately 6 cm wide and tall. Alternatively, spoon into domes if piping is unavailable.
09 -
Gently brush the piped mounds with the remaining 30 g melted butter. Bake for 16–19 minutes, or until golden brown at the edges.
10 -
Serve immediately, garnishing with fresh parsley and additional grated parmesan if desired.