Combine mayonnaise and chipotle, set aside.
Dry the beans well after washing, extra moisture keeps the burgers from forming together. In a medium bowl, mash beans with a fork until thick and pasty.
In a food processor, finely chop bell pepper, cilantro, onion, and garlic. Then add oats or crumbs followed by egg and spices.
Place into mashed beans in step 1.
Divide mixture into 4 patties with slightly oiled hands and place onto a flat surface covered with wax paper. (If it’s too wet, chill the mixture for 15-25 minutes in the refrigerator or add another tablespoon of oats.)
Heat a lightly greased skillet, preferably with coconut oil, to medium heat and cook frozen burgers about 7 minutes on each side. Can also be cooked on a grill over medium heat.