Chicken Tikka Masala

I really, really wanted to get this recipe right, because it’s such a crowd-pleasing favorite that in its non–slow cooker forms relies a great deal on techniques and processes that don’t necessarily translate to slow cookerdom. I went through probably half a dozen trials and finally came up with something I was quite happy with. Then my friend Leda tried out my recipe for her husband and her mother-in-law, who are accomplished cooks from Hyderabad. They were not impresse