You can also cook apples with celeriac and mash together for a sweet tasting variant. You can also omit the potato and just use the celeriac.
Juice of ½ lemon
1 celeriac, trimmed and peeled
1 potato, cut into cubes
1 cup milk or stock
1 tablespoon butter
1 sprig fresh thyme (optional)
- Put 2 cups cold water in a large bowl and add the lemon juice. Chop the celeriac into cubes the same size as the potato, then put in the lemon water until ready to use.
- Put the potato and celeriac in a saucepan with the milk or stock and bring to a boil over high heat. Cover, reducing the heat to medium-high and cook for 15 minutes, or until potatoes and celeriac are tender. Mash together with the milk or stock. Season with sea salt and pepper, then stir in butter (or olive oil) and serve.