Butter Chicken

Optional: blend the marinade ingredients (except chicken) until smooth for an extra smooth sauce. Marinating time is extra (3 hours minimum, overnight best). Use pure chilli powder or cayenne, not American-style chili powder. Ghee can be swapped for butter or neutral oil. Tomato passata = tomato puree in the US; or blend canned tomatoes. For a lighter sauce, use 3/4 cup light cream + 1/4 cup milk.