Step #1 From "Eating In," The Biosphere Press, Space Biosphere Ventures.
Step #2 Mix all the ingredients thoroughly, either in a food processor/blender or with a potato masher.
Step #3 The cooked beans should be mashed, not pureed, & the mixture should form into balls easily.
Step #4 If the mixture is too wet, add a little more breadcrumbs or flour.
Step #5 Form the mixture into eight burgers & place them on a lightly greased baking tray.
Step #6 Bake at 350'F.
Step #7 for 45 mins, turning them over after 30 mins.
Step #8 Place the burgers inside buns ("Eating In" also includes a recipe for whole-wheat buns) & top this with fried onions, tomato, pickles, lettuce, or whatever your taste dictates.