Heat a large skillet over medium-high heat.
Pour 2/3 of the can of black beans into a medium sized bowl including some of the liquid. Mash the beans with a fork so that at least half the beans are mashed and the rest are in small pieces.
Add in the whole undrained can of diced green chiles, breadcrumbs, spices and 2/3 of the egg after you've cracked and scrambled it. Mix until al combined.
Form into 4 equal patties. Place the cornmeal on a small plate. Coat the outside of each patty, top and bottom, in cornmeal.
Add the canola oil to the warmed skillet and allow to heat for 1 minute. Add burgers to the pan and fry for 5 minutes on each side.
When you flip the burgers over add a slice of pepper jack cheese to each burger. Cover with a lid while they cook on the other side to melt the cheese. Remove burgers from oil and allow to cool for a minute or two.
Top however you prefer. I placed mine on a bed of iceberg lettuce and topped with salsa and sour cream. Also would suggest avocado or a whole roasted green chile for a boarder burger as my family like to call it.