Preheat oven to 400°F (204°C). Place a large star tip (#825) in a piping bag and line 2 cookie sheets with foil lightly greased. Set aside.
In a medium pot boil sliced potatoes until tender. Drain potatoes and mash with butter, seasoning and cream until smooth and fluffy. Using a hand mixer, add yolks one at a time to potato mixture, mix until fully incorporated. Fill prepared piping bag with prepared potato mixture and pipe on prepared cookie sheets leaving 2” between each mound. Brush potato mounds with 2 tbsp melted butter. Bake at 400°F for 20 minutes. Remove from oven and let cool on pan for 5 minutes. Garnish with fresh chives (optional) and serve with your favourite protein.
Yields 25 mounds