I found this recipe here.
I love black beans and typically prefer them to meat (for reasons relating to taste and cost), so this recipe was perfect. My carnivorous husband even enjoyed them, so there's hope for us yet.
I used homemade whole wheat rolls instead of hamburger buns. We are still looking for a way to make the middle a bit more firm (I think I put in more than 3 T salsa), so the smaller size burger worked better for that. I also put in homemade bread crumbs, so perhaps those weren't toasted well enough. In spite of those minor problems, yum!
* 2 cups black beans, mashed up
* 1 cup bread crumbs
* 3 TBLS salsa
* 1 egg
* 1 Cup cooked rice (brown or white)
Combine all ingredients. Make patties out of mixture. Place on griddle and cook until browned or crisp. Add lettuce, tomatoes, and other hamburger condiments to finished patties and bun.