For a convenient and hands-off approach to butter chicken, try making it in a slow cooker. The chicken is marinated in a mixture of yogurt, lemon juice, and spices, then cooked low and slow in a creamy tomato sauce. The sauce is made with butter, onions, garlic, ginger, and a blend of aromatic spices. Simply combine all the ingredients in the slow cooker and let it cook for several hours until the chicken is tender and the flavors have melded together. Serve this slow cooker butter chicken with basmati rice or naan bread for an easy and delicious meal.