Chicken ginger casserole

This recipe is inspired by one of the dishes of an excellent Chinese restaurant in Estoril, where we go whenever we are celebrating a family birthday. I've to tried decipher all the ingredients present in the restaurant recipe, adapted some and added a few of my own. My version tastes totally different from the restaurant one, but I hope it is just as good.

Ingredients (four 4)

• 1 skinless chicken cut into pieces
• 1 onion
• olive oil
  
• 1 leek
• 2.5 cm (1 inch) fresh ginger
• salt
  
• pepper
• 2 tablespoons wholemeal flour
  
• 1/2 tablespoon brown sugar
• 3 tablespoons white wine vinegar
• 1/3 cup soya sauce
• mushrooms
  
• fresh coriander

1. Season the chicken with salt and pepper
2. Chop the onion and brown it in olive oil in a large casserole
3. Add the chicken pieces and stir-fry them with the onions
4. Add the sugar and wholemeal flour and mix until browned
5. Slice the ginger and add it to the casserole
6. Add the vinegar and keep stirring
   
7. When everything is nice and browned, add a bit of soya sauce and then some water
   
8. Mix in the sliced leek (green leaves included) and mushrooms
   
9. Cook for 30 minutes
10. Add fresh coriander just before serving

Serve with basmati rice and a green salad.