Ingredients Chicken Marinade – 1 1/2 lb boneless skinless chicken thighs diced  – 1/2 cup plain whole milk yogurt – 1 tbsp minced garlic – 1 tbsp minced ginger – 2 tsp garam masala – 1 tsp cumin – 1 tsp salt – 2 tbsp lemon juice Butter Chicken Sauce – 1 tbsp olive oil – 2 tbsp butter – 1 onion sliced – 1 1/2 tbsp minced garlic – 1 tbsp minced ginger – 1 tsp cumin – 1 1/2 tsp garam masala – 1 tsp chili powder – 14 oz diced tomatoes – 1/2 cup heavy cream