1. Oven temperature of 180 degrees, gas mark 6.
2. Butterfly- cut the chicken breasts and flatten out.
3. Thinly cover with tomato puree.
4. Sprinkle peppers and onions over the top.
5. Place on a baking tray in a pre-heated oven for 15 - 20 minutes.
6. Remove and sprinkle with goats cheese and walnuts.
7. Place back in oven for 5 minutes then serve.