1 slice whole wheat bread
1/4 cup grated onion
1 Tablespoon garlic
1 1/2 teaspoons fresh lime juice
3/4 teaspoon cumin
3/4 teaspoon salt
1/2 teaspoon grated lime zest
15 ounce can black beans, drained
1/3 cup coarsely chopped walnuts
1/2 teaspoon hot sauce
4 teaspoons olive oil
Place bread in a food processor. Pulse until coarse crumbs. Transfer to a bowl.
Combine onion, garlic, lime juice, cumin, salt, lime zest and beans in food processor. Pulse 5 times.
Add bean mixture, walnuts, hot sauce and egg to crumbs. Stir well.
Divide mixture into 4 equal portions. Shape into a thick patty.