Chicken Tikka Masala

Name: Chicken Tikka Masala
Cuisine: Indian
Ingredients: 6 garlic cloves, finely grated; 4 teaspoons finely grated peeled ginger; 4 teaspoons ground turmeric; 2 teaspoons garam masala; 2 teaspoons ground coriander; 2 teaspoons ground cumin; 1 1/2 cups whole-milk yogurt (not Greek); 1 tablespoon kosher salt; 2 pounds skinless, boneless chicken breasts, halved lengthwise; 3 tablespoons ghee (clarified butter) or vegetable oil; 1 small onion, thinly sliced; 1/4 cup tomato paste; 6 cardamom pods, crushed; 2 dried chiles de árbol or 1/2 teaspoon crushed red pepper flakes; 1 28-ounce can whole peeled tomatoes; 2 cups heavy cream; 3/4 cup chopped fresh cilantro plus sprigs for garnish; Steamed basmati rice (for serving)