On low heat, heat a tablespoon of olive oil in a skillet. Add the onion and jalapeno and cook until very soft for about ten minutes. Pour the cooked vegetable into a bowl. Add the beef and salt and pepper and form the mixture into four patties.
Heat a cast iron skillet on high heat. Drizzle the skillet with the other tablespoon of oil, and cook the burgers to your desired doneness. When they're almost done, top each burger with the cheese.
While the burgers cook, mix together the Chipotle Mayonnaise. Simply mix together the mayonnaise and the chipotles. Spread the buns with the Chipotle Mayonnaise. Add a burger to each bun, along with some lettuce and tomato.