Butter Chicken - (Murgh Makhani) - cooking recipe

Ingredients

Marinade
1 3/4 lbs boneless chicken breasts, cut into pieces
1 tablespoon yogurt
1 tablespoon vinegar or 1 tablespoon lemon juice
1 teaspoon ground coriander
1 teaspoon ground cumin
1 teaspoon red chili powder (heat level of your choice)
1 small onion, minced into a paste
2 teaspoons ginger paste
2 teaspoons garlic paste
salt, to taste
sugar, to taste (I use a pinch only)
Gravy
4 roma tomatoes, chopped
4 tablespoons butter
1 tablespoon fresh cream, whisked
1 teaspoon ground coriander
1 teaspoon ground cumin
1 teaspoon red chili powder (heat level of your choice)
1 teaspoon black pepper
2 teaspoons finely chopped gingerroot
2 teaspoons green chilies
1 tablespoon cashews, to thicken (optional)
salt, to taste
Garnish
2 tablespoons melted butter (garnish)
fresh cream (garnish)
finely chopped cilantro (coriander leaves, garnish)

Preparation

Perforate the chicken pieces with either fork tines or with little knife cuts. (The idea is to allow the marinade to penetrate the pieces somewhat and have more surface areas to cling to.) Mix well the ingredients for the marinade and rub into the chicken pieces. Let it marinate for a few hours in the refrigerator, overnight if possible for best results.
Heat half the butter on medium in a heavy-bottomed pan and put in the chicken along with the marinade. Cover and cook for about 25 minutes or till the chicken is fully cooked. After the liquids have evaporated, stir fry the chicken for some time in the residual fat.
Heat the remaining butter in a saucepan and add the red chilli powder, coriander, cumin and black pepper. (See TIP at bottom) Fry for a few seconds. (See Step 6 Tip.).
Add the chopped tomatoes, sugar and salt and cook uncovered on medium for about 7 minutes until the puree thickens and the fat separates. Stir in the whisked cream and reduce the heat to low.
Add the chicken, chopped ginger and green chillies to the simmering gravy. Sprinkle salt to taste if needed. Mix well. Cover and simmer on low heat for about 10 minutes or till the curry is thoroughly heated through.
Just before serving pour melted butter over the curry. Garnish with a swirl of fresh cream and finely chopped coriander leaves.
TIP: For a thicker and richer gravy cashewnut paste (soak cashews in water for an hour or so and grind them) can be added while making the gravy in step 3 -- fry it along with the spice powders and then proceed as above.