Ideal to use mashed potatoes leftovers, or if you want to make your purée as we say in French, decadent yet fancy. In a gratin dish, combine mashed potatoes with egg and cheese and grill.
Use 250 gr of mashed potatoes leftovers or make a from scratch by:
Peel 250 gr of potatoes, cook them in a large volume of salted water and drain.
Mash potatoes with a food mill or with a fork and combine them when still hot with a large knob of butter and warm milk. Adjust quantity of milk if necessary.
GRATIN
Preheat the oven to 200 °C / 390°F.
Combine 250 gr of mashed potatoes with 1 beaten egg and a large handful of grated cheese (i.e. about 50 gr). Season.
Grease a small oven proof gratin dish with butter. Pour in the preparation and bake in the oven for about 15 minutes.