Pat the chicken thighs dry and trim any excess bits if needed.
In a bowl, mix yoghurt, lemon juice, grated ginger, garlic, chilli powder, cumin, turmeric, garam masala, and salt until smooth.
Add chicken thighs and coat well on all sides.
Cover and set aside while you prepare the baking dish.
In a baking dish, combine tomato passata, heavy cream, butter, sugar, and salt. Stir until fully blended.
Place coated chicken into the sauce and spoon a little coating over the top.
Bake until bubbling and the chicken reaches 165°F (74°C) in the thickest part.
Rest 5–10 minutes, garnish with coriander leaves, and serve with basmati rice.