Slow cooker chicken tikka masala

Chicken second courses

2 pounds chicken thighs, bone-in and skin-on. 1 cup full-fat canned coconut milk 2 cups organic crushed tomatoes 1 TBSP fresh ginger root, minced 3 cloves garlic, minced ½ large white or yellow onion, thinly sliced 1 TBSP + 2 tsp garam masala 1 tsp ground coriander 1 tsp ground cumin ½ tsp kosher salt (less for finer grain) ¼ tsp red chili flakes 1 TBSP coconut palm sugar 2 TBSP butter or ghee coconut oil Optional: cilantro for garnish