Foryoueats: Butter Chicken

Ingredients

• 1½ lbs chicken tenderloins, tendons trimmed, or boneless skinless breasts, cut into 1½-inch pieces (see note)
• 1¼ teaspoons salt
• 2 teaspoons garam masala
• 3 tablespoons all-purpose flour
• 2 tablespoons unsalted butter
• 1 tablespoon vegetable oil
• 1 medium yellow onion, finely chopped (about 1 cup)
• 1½ tablespoons finely chopped fresh ginger (from a 2-inch knob) (see note)
• 1 teaspoon ground coriander
• 1¾ teaspoons ground cumin
• ⅛ teaspoon cayenne pepper (optional)
• 1 (8-ounce) can tomato sauce
• 1 cup heavy cream
• ¾ teaspoon sugar
• ¼ teaspoon freshly ground black pepper
• 3 tablespoons water
• 3 tablespoons chopped fresh cilantro (optional)
• For Serving (optional):
• Basmati rice
• Mango chutney (such as Major Grey's)