Spiced Chicken with Tomato and Cream

Name: Spiced Chicken with Tomato and Cream
Ingredients: 3 tablespoons ghee (clarified butter) or vegetable oil; 6 chicken legs (drumsticks with thighs; about 3 lb.); Kosher salt and freshly ground black pepper; 1 medium onion, finely chopped; 4 cloves garlic finely grated; 2 tablespoons finely grated peeled ginger; 2 tablespoons tomato paste; 2 teaspoons garam masala; 2 teaspoons ground cumin; 2 teaspoons ground turmeric; ½ teaspoon ground coriander; ¾ teaspoon cayenne pepper; ¾ teaspoon ground cardamom; 8 cups low-sodium chicken broth; ¾ cup canned tomato purée; ½ cup heavy cream; 1 pound small Yukon Gold potatoes, sliced ¼” thick; Plain yogurt, torn fresh mint, and naan, flatbread, or cooked rice (for serving)