1. In a large bowl, mash the beans with a potato masher.
2. Mix in the red onion, red bell pepper, poblano or other roasted pepper, cumin, chili powder, cilantro, cayenne and salf and pepper.
3. Heat the oil in a heavy skillet over med-high heat.
4. Form the mixture into 6 or 8 patties and fry, about 2 minutes per side.
5. Serve hot on buns or pita bread with lettuce, tomato and salsa of your choice.