Sweet potato gratin with orange juice

Oranges are great this time of the year. You can use orange in food as well. This gratin is nice together with some smoked ham for example.

500 g sweet potato

50 g butter

1 dl orange juice

salt and pepper

Peel and cut the sweet potato in cubes. Boil in water until soft. Mash the sweet potato with butter and orange juice. Add salt and pepper. Heat up the oven to 180 degrees C. Grease an oven tray and pour the mash in. Cook in the oven for 30 minutes.