In a food processor, roughly blitz the chicken thighs into chunky mince. Alternatively, chop into bite-sized pieces.
Heat the oil in a large saucepan. Add half the onion and the chicken mince. Season well and cook for about 5 mins on a high heat to brown, breaking up the meat with a spoon. Add the spices, vinegar, chipotle paste, passata and sugar. Cook for another 5 mins, then remove from the heat.
In a small bowl, mix the remaining onion, the pineapple and coriander. Serve the chicken and the pineapple salsa with warm tortillas and hot sauce.