In a large pot, heat olive oil. Add onion and cook 3-5 minutes, stirring occasionally. Add red bell pepper and cook another minute. Add cumin, chili powder, cayenne, ground coriander, salt and garlic and stir another minute. Add red beans, crushed tomatoes and corn kernels and mix well. Add vegetable stock. Bring to a simmer. Cover and cook about 15 minutes. Stir in lime juice and cook another 5 minutes uncovered. Serve with crushed tortilla chips and lime wedges. Top with diced avocado, if you like.
Recipe by Homemade Levity at http://www.homemadelevity.com/vegan-tortilla-soup/