- 2 celeriacs, peeled and roughly cut
- 2 potatoes, peeled and roughly cut
- 1 onion, large dice, divided
- 2 tablespoons butter
In a small sauce pot place celeriac, add water to cover. In separate pot place potato with water to cover. Place half the onion in each pot and simmer until each is fork tender. Strain liquid and place all ingredients in a food processor. Puree until mash has a smooth consistency. Season with salt and pepper to taste.