Fish with tahin topping

600 gram white fish (e.g. cod)
2 onions
olive oil
1,5 dl. tahin
1 lemon
1 dl. water

saute onions 10 minutes until soft
mix tahin with lemon juice, water and onions and put on top of fish
put in oven for 10-12 minutes at 200 degrees

serve with potatoes or pasta

Source: Aarstiderne