Chicken Nachos


3 chicken breast (cooked) or 1 barbecued chicken
1 tablespoon olive oil
1 onion, finely chopped
1 tsp chili flakes
1 tsp hot cayenne pepper
425g can crushed tomatoes
400g can red kidney beans, drained, rinsed
1/2 cup water
1/2 cup coriander leaves
200g corn chips
1 1/2 cups grated cheese
1 avocado, mashed, to serve
sour cream, to serve