Place the apple, 3 tbsp of coriander, mint, yogurt, ricotta, chillies, scallions, salt, sugar, garlic, and ginger in a food processer and process for 1 minute. Scrape around the outside of the bowl and process for a few seconds more.
Heat the oil in a wok or a large pan, pour the yogurt mixture and cook gently over low heat for about 2 minutes.
Add the chicken pieces and stir well to blend everything together. Cook over a medium-low heat for 12-15 minutes or until the chicken is fully cooked.
Sprinkle the raisins and remaining cilatro over the chicken. Plate and serve.