This slow-cooker tikka masala is an ideal set-and-forget option for anyone craving veggies and warm, cozy spices. A combination of garam masala, curry powder and cumin adds to the complex flavor. If you don’t have any garam masala on hand, you can swap it out for additional curry powder. We love how brown rice soaks up the sauce, but you could easily skip the rice and serve this with warm whole-wheat naan instead.