Preparation time: 10 minutes
Cooking time: 35 minutes

4 cooked chicken breasts
55g/2oz butter
55g/2oz flour
500ml/1 pint milk
100g/4oz strong cheddar, grated
1 x 85g/3oz pack watercress, roughly chopped
large pack plain crisps

Place the chicken breasts in a casserole dish. Make a sauce: melt the butter, add the flour and stir well over a medium heat for 2-3 minutes. Remove from the heat, gradually stir in the milk, bring to the boil and beat in the grated cheese and roughly chopped watercress, leaving a few sprigs for garnish.

Pour over the chicken. Cook for 20 minutes at 200°C, Mark 6. Finally sprinkle the crisps on top, garnish with watercress and serve with rice.