* 900 g Celeriac, peeled
* 1 tablespoon White wine vinegar
* 350 g Cheddar cheese, Grated
* 50 g Butter
* 1 teaspoon Sugar
* 2 teaspoons Salt
* Pinch of Black pepper
* 150 ml Sour cream
* 1 tablespoon Flour, mixed to a paste with 3 tablespoons water
* 4 tablespoons lightly Toasted fresh Breadcrumbs

===Method===
* Half fill a large pan with lightly Salted water.
* Bring to the Boil and add the whole but peeled Celeriac and the Vinegar.
* Boil for about 20 minutes or until slightly soft.
* Drain, and when cool enough to handle, cut the Celeriac into 3 mm slices.
* Grease a large Casserole dish and fill with alternate layers of Celeriac and Cheese, dotting each layer with Butter and sprinkled Salt, Pepper and Sugar.
* Finish with a layer of Cheese.
* In a bowl, mix the Sour cream and the Flour and water mixture.
* Pour over the top of the Cheese.
* Sprinkle over the Breadcrumbs and Bake for 20-25 minutes at 180° C (350° F - gas 4).
* If the top has not Browned, you can finish it off under a hot Grill.

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