For the Meatballs:

• 1 ½ pounds ground chicken
• ½ cup breadcrumbs
• 1 large egg
• 2 cloves garlic, minced
• 1 tablespoon grated ginger
• 1/2 teaspoon garam masala
• 1/2 teaspoon ground cumin
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper

For the Sauce:

• 2 tablespoons olive oil
• 3 tablespoons butter
• 1 small onion, finely diced
• 3 cloves garlic, minced
• 1 tablespoon grated ginger
• 1 tablespoon garam masala
• 1 teaspoon ground cumin
• 1 teaspoon ground coriander
• 1 teaspoon paprika
• 1/2 teaspoon turmeric
• 1/4 teaspoon cayenne pepper (optional)
• 1 (15-ounce) can tomato sauce
• 1 cup heavy cream
• 1/2 cup plain Greek yogurt
• 1/2 teaspoon salt (or to taste)

For Serving:

• Fresh cilantro for garnish
• Cooked rice or naan