In a blender, put in the coriander, mint leaves, ginger-garlic paste, lemon juice, green chillies, salt and blend Place the chicken in a bowl, and rub with the mixture Cover and refrigerate for two to three hours Pre-heat the oven to medium heat. Lightly grease a baking dish Place the chicken in the baking dish and bake for 20 minutes, or until the chicken is done Just five minutes before taking out the dish, sprinkle with onion rings and bake again.