Chili-Potato Gratin

I first discovered how good chili and potatoes taste together years ago when I topped a baked potato with some chili. This gratin reunites those flavors by layering sliced potatoes and chili in a slow cooker for a tasty weeknight meal. The thinner you slice the potatoes, the more quickly they will become tender. To make the recipe gluten-free, omit the optional bread crumbs or use gluten-free crumbs. To make it soy-free, use about 1½ cups of finely chopped seitan or cooked lentils instead o