I made these last night and they were super easy and extremely tasty. I got the recipe from http://www.vegetariantimes.com which has amazing recipes and I highly recommend getting the magazine subscription. Every recipe they have that we have made has been very good.
Black Bean and Walnut Burger
2 15-oz. cans black beans, rinsed and drained well
2 tsp. ground cumin
3 tsp. chili powder
1/8 to 1/4 tsp. cayenne pepper
1/2 cup cooked brown rice
1/2 cup chopped walnuts
1/3 cup chopped red onion
3 Tbs. canned corn
1/3 cup cornmeal
guacamole, for garnish
chunky salsa, for garnish
These burgers go together in no time, but if you want to get a jump-start on cookout prep, you can make them a day ahead. Refrigerate the mixture until about an hour before you’re ready to grill.
Purée 2 1/2 cups beans with cumin, chili powder and cayenne pepper until smooth. Add rice, walnuts, onion, corn and remaining beans, and pulse 2 or 3 times to mix. (Mixture should be stiff but not dry.) Add 2 to 3 Tbs. water to moisten, if necessary. Season to taste with salt and pepper. Cover and chill, if making ahead. Divide mixture into 8 burgers. Dredge burgers in cornmeal. Chill 30 minutes (unless mixture has been made earlier and chilled.)
Coat nonstick pan or grill with cooking spray. Cook burgers over medium heat 4 minutes. Flip, and cook 4 minutes more, or until heated through. Garnish with guacamole and salsa, if desired, and serve.