In a medium bowl, mix the butter chicken sauce, coconut milk, melted butter, garlic powder, ground ginger, salt, and pepper until well combined.
Pour the mixture over the meatballs, stirring gently to coat evenly.
Cover and cook on low for 3-4 hours, or on high for 2-3 hours.
Serve with rice or naan and garnish with fresh cilantro if desired.
Notes
****If you don't have butter chicken sauce, substitute with 1 can (15 oz) tomato sauce and 1 tablespoon garam masala (or curry powder). Use the full can of coconut milk for extra creaminess, and consider doubling the garlic powder, ginger, salt, and pepper for more flavor.****If the sauce seems too thin, reduce the coconut milk to 1/2 cup or simmer uncovered for the last 30 minutes to thicken.