Potato Gratin

Directions

1. 1
   Peel the potatoes and chop into 2cm slices.
2. 2
   Put them into a pot of salted water and boil until the potatoes become soft.
3. 3
   Slice the onion, and fry in a pan with olive oil until browned.
4. 4
   To make the white sauce, put the margarine and flour into a pan on medium heat and stir until the mixture becomes sticky.
5. 5
   Then add milk, season with salt, pepper and garlic powder.
6. 6
   Continue to stir gently to avoid getting lumps in the mixture.
7. 7
   Preheat the oven to 200C/400F.
8. 8
   Put the potatoes with the onions on a baking dish and pour on the white sauce.
9. 9
   Finally add grated cheese on top.
10. 10
    Bake for about 15 min or until the top has browned nicely.