Preheat the oven to 180° / gas 4. Arrange the chicken breasts in a baking dish and set aside.
Put the tomatoes, chilli, onion, garlic, vinegar, chipotle paste and oil in a food blender and blitz until smooth.
Pour the tomato sauce over the chicken pieces, place in the oven and bake for 30mins.
Remove from the oven and arrange the grated cheese over the chicken, place back in the oven and bake for a further 15mins or until the chicken is cooked through and the cheese has melted.
Remove and serve with roasted garlic new potatoes or salad.