Step 1

Place the chicken into a large mixing bowl, and add the yogurt, sour cream, 2 tsp minced garlic, ground ginger, ½ tsp cumin, 1 tsp garam masala, ½ tsp turmeric and salt and pepper to taste. Toss to combine all of the ingredients well.

Step 2

Heat the oil in a large skillet over medium high heat.

Step 3

Add the chicken to the heated oil, and sear for 4-5 minutes per side.

Step 4

Remove the chicken and set aside.

Step 5

Wipe out the pan.

Step 6

Reduce the heat to medium, and add the butter to the skillet.

Step 7

Saute the onions in the butter until beginning to soften.

Step 8

Add the coriander, garlic, cumin, turmeric, garam masala and salt and pepper to taste to the skillet, and saute for 1 minute.

Step 9

Stir in the ginger paste, tomato sauce and coconut milk until well combined.

Step 10

Return the chicken to the skillet, and toss to coat in the sauce.

Step 11

Reduce the heat to medium low, and simmer for 20 minutes.