celeriac, peeled and cut
potatoes, peeled and cut
onion, diced into large pieces and divided in half
- 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, including butter, in a food processor or blender.
- Puree until mash has a smooth consistency.
- Season with salt and pepper to taste.