CHIPOTLE BISON BURGERS

Steps:

• Halve and pit the avocado, then scoop the flesh into a small bowl. Add the lime juice, cilantro, 1/4 teaspoon cumin and a big pinch of salt. Mash and stir until well combined; set aside.
• Combine the bison, chipotles, remaining 3/4 teaspoon cumin, the oregano, 1/2 teaspoon salt and a few grinds of pepper in a medium bowl; mix well. Form into 4 patties, about 4 1/2 inches wide and 1/2 to 3/4 inch thick. Heat the vegetable oil in a large nonstick skillet over medium-high heat. Add the patties and cook until browned, about 3 minutes per side for medium, putting 1 cheese slice on each burger during the last minute of cooking.
• Serve the burgers on the buns with ketchup, the avocado mixture, shredded lettuce, sliced onion and cilantro. Serve with tortilla chips and the lime wedges.