Preheat oven to 400 degrees. Place a sheet of foil on a baking pan and lightly oil.
In a large bowl, combine the ingredients. Mash the beans lightly -- my favorite method is using a potato masher. I like some bean pieces to remain, but you can make it as mashed as you'd like. Note: You may have to add extra cornmeal if you mash too much.
Form burgers into patties - I usually make 4. Sliders are always fun, too.
Bake for about 10-12 minutes or until set. {They'll set up some more as they cool off.}
Optional: For Chipotle Mayo - Combine your favorite mayonnaise with a few drops of adobo sauce from a can of chipotles, and a squeeze of lime. Stir well.
Serve on buns {or not!} with your favorite toppings - cheese, lettuce, salsa, chipotle mayo, etc. See below for Roasted Poblano Salsa recipe.