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Combine the natural yoghurt, lemon juice, turmeric, garam masala, chilli powder, cumin, ginger and garlic, then blend.
Combine the natural yoghurt, lemon juice, turmeric, garam masala, chilli powder, cumin, ginger, garlic and chicken thigh covered, then chill for 3 hours for at least 3 hours or overnight.
Heat the ghee and vegetable oil in a pan over high heat, then remove the chicken thigh from the marinade.
Cook the chicken thigh for 3 min.
Add the tomato passata, cream, white sugar and salt, simmer over low heat for 20 min, then season to taste.
Garnish with the coriander, then serve with the basmati rice.