Slow Cooker Vegetarian Sweet Potato and Black Bean Burritos with Lime

black beans (or use 1 1/2 cups cooked black beans)

large orange-fleshed sweet potatoes, diced in 1 inch cubes (about 1 1/2 lb. sweet potatoes; sometimes

called yams in U.S. stores)

vegetable stock or canned vegetable broth

fresh squeezed lime juice

ground cumin

ground coriander

minced garlic

salt and fresh ground black pepper

medium-sized flour tortillas (I used my favorite low-carb tortillas.)

chopped fresh cilantro for serving (optional)

shredded mozzarella cheese for serving (optional)

shredded lettuce for serving (optional)

sour cream for serving (optional)

lime pieces to squeeze on filling (optional)

Green Tabasco Sauce (optional)