Penne with chicken in a creamy mushroom and cheese sauce

Ingredients:
* 200 g (7 oz) penne
* 2 tbsp olive oil
* 150 g (5 oz) button mushrooms, sliced
* 1 clove garlic, crushed
* 2 chicken breasts, cut into bite-sized pieces
* 200 g (7 oz) mascarpone cheese
* 100 g (4 oz) Gruyere cheese, grated
* 75 ml (2 1/2 fl oz) chicken stock
* 1 tbsp fresh chopped oregano
* salt and freshly ground black pepper

Cook the penne in a large pan of lightly salted water according to the packet instructions. Heat the olive oil and saute the mushrooms and garlic for 3 minutes. Add the chicken and cook for a further 5 minutes. Stir in the mascarpone and Gruyere cheeses, stock and oregano and simmer until the cheese has melted and the sauce has thickened slightly (about 4 minutes). Season to taste and stir in the penne.

Serves: 4 portions