Mix all the chicken tikka marinade ingredients together in a bowl. Add the chicken and stir to coat well. Leave covered in the fridge for a minimum of 2 hours, or overnight if poss
Place the chicken on a baking tray in a preheated oven at 180° C or 350° F for 15-20 minutes or until slightly charred. Remove and leave to cool.
Sauce
Melt 40g of the butter on a medium heat, add the chopped onions, ginger and garlic. Cook for approximately 8-9 minutes until onions are soft and translucent. Add Mrs Balbir Singh’s Butter Chicken Blend and stir for a few seconds.
Add tomatoes, sugar, salt, milk and water, then stir until mixed well together. Cover and cook on a medium heat for 10 mins. Remove pan from heat and blend mixture with a hand blender in the pan, or in a mixer so that it is smooth. Place back on heat.
Add the chicken pieces, stir and cook for a further 3-4 mins on medium heat until the chicken is heated through. Add the cream, remaining 20g of butter, and Mrs Balbir Singh Original Garam Masala. Stir and cook for a further 2 mins.