Add the yogurt, garlic, lemon juice, ginger, garam masala, turmeric, cumin, salt, and peppers in a large Ziplock bag. Gently smush the spices into the yogurt to combine, then add the chicken pieces to the bag, massaging to coat it in the spiced yogurt.
¾ cup full-fat plain yogurt, 2 cloves garlic, 1 tablespoon lemon juice, 1 tablespoon grated fresh ginger, 1 tablespoon Garam Masala Indian spice, 1 teaspoon ground turmeric, ½ teaspoon ground cumin, ½ teaspoon kosher salt, ¼ teaspoon ground black pepper, ¼ teaspoon ground cayenne pepper, 1½ pounds boneless, skinless chicken thighs
Seal the Ziplock bag and refrigerate for at least 3 hours, or overnight.
In a large skillet, melt the butter (or ghee) over medium-high heat. Working in batches, cook the coated chicken pieces in the skillet for 2-4 minutes, flipping once, until the outside of the chicken is a light golden brown.
3 tablespoons unsalted butter
Add the tomato sauce, cream, tomato paste, and sugar to the skillet, then stir until well combined. Reduce the heat to medium-low and simmer for 20 minutes, stirring occasionally, until thickened. Taste and adjust seasonings as desired.
8 ounces tomato sauce, 1 cup heavy cream, 1 tablespoon tomato paste, ½ tablespoon granulated sugar
Serve garnished with cilantro.
Fresh cilantro