These burgers are so satisfying, you won't even realize that you're not eating meat.  They taste like something you'd find at a high-end Mexican restaurant, but you 've probably got most of the ingredients at your house.  And, they're so quick and inexpensive, you'd never expect them to be so tasty!

2 cans of black beans, rinsed and drained
1/2 onion, diced
1/4 c cilantro
1/4 c mayonnaise
1/3 c bread crumbs
1 t cumin
1 t oregano
1/4 t cayenne pepper
3 T vegetable or olive oil
4 whole-wheat hamburger buns
crumbled cotija cheese (optional, but everything's better with cheese)

Pulse half of the black beans in a food processor with cilantro, mayonnaise, breadcrumbs, and spices until it forms a thick paste. Then, transfer it to a large bowl, mix the remaining beans and onion, and form into patties.

Heat oil in a large pan over medium-high heat until it shimers. Fry burgers until they are crispy on the outside, and delicious on the inside, turning once, for about 7 minutes total. 

Place burgers on buns, top with cotija cheese, avo-de-gallo and chipotle lime sauce, and serve with sweet potato fries. At least, that's how I do it...