For the Meatballs:

• 1 lb ground chicken
• 1/3 cup breadcrumbs
• 1 egg
• 2 cloves garlic, minced
• 1 teaspoon grated fresh ginger
• 1/2 teaspoon ground cumin
• 1/2 teaspoon salt
• 1/4 teaspoon ground turmeric
• 1/4 teaspoon chili powder (optional)
• 1 tablespoon chopped cilantro (optional)
• 1 tablespoon oil (for cooking)

For the Butter Chicken Sauce:

• 2 tablespoons butter
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 1 tablespoon grated fresh ginger
• 2 tablespoons tomato paste
• 1 1/2 teaspoons garam masala
• 1 teaspoon ground cumin
• 1/2 teaspoon ground coriander
• 1/2 teaspoon paprika
• 1/4 teaspoon turmeric
• 1 (15 oz) can tomato sauce or crushed tomatoes
• 1 teaspoon sugar (optional, to balance acidity)
• 1/2 cup heavy cream or full-fat coconut milk
• Salt, to taste
• Fresh cilantro, for garnish