Method
Combine tomato purée, tinned tomatoes, onion, pepper, garlic and chillies in a saucepan and heat until bubbling.
Grill chicken breasts until brown.
Once cooked, add chicken in small chunks to ingredients in saucepan and mix.
Add natural yogurt to the mixture.
Heat tortillas in microwave for 2 minutes.
Top with grated cheese and melt until light brown.
Serve with salad.