Step 1

Heat the oil in a large non-stick flameproof casserole dish or saucepan. Fry the onions with a pinch of salt for 10 mins, or until softened. Add the garlic and fry for 1 min more. Tip in the chipotle paste, tomatoes and sugar with half a can of water. Sit the chicken thighs in the sauce. Bring to a low simmer and cook, covered, for 20-25 mins, stirring often, until the liquid has reduced slightly and the chicken is cooked through.

Step 2

Using two forks, shred the chicken and stir it back through the sauce. Season to taste. If the sauce is too thin, return to the heat and simmer for 5 mins until the sauce has reduced more. To freeze, leave to cool completely and transfer to large freezerproof bags.

Step 3

To make the salsa, combine the red onion, tomatoes, lime zest and juice, coriander leaves and stalks. Season to taste. Serve the chicken with the tomato salsa, tortilla chips, guacamole and a scattering of coriander leaves.