In the bowl of your food processor or mixer, chop or mash the black beans. Add the salsa, tortilla chips, chopped onion, egg and mayonnaise. Mix until well combined, then add the seasonings, mixing again.
Spoon into a bowl and let stand for 10 minutes. Taste the mixture and, if necessary, add more seasonings, sea salt or fresh pepper.
Divide the mixture into eight portions, each about ½ cup (108 grams). Flatten to make burgers. The burgers may be wrapped in plastic and stored in the refrigerator until ready to cook.
To cook: Heat a non-stick or cast iron skillet over medium-high heat. Add the number of burgers that fit comfortably in the pan, reduce the heat to medium-low, and cook until the burgers are nicely browned on both sides and heated through, about 4 minutes per side.
To serve: Toast a whole-wheat bun or bread, top with: guacamole, sprouts, sliced tomato, sliced red onion, Cheddar cheese and/or more salsa.