Place rice, prunes, nuts, breadcrumbs, beans, onion, garlic salt and egg in a food processor. Pulse on and off until all ingredients are finely chopped, being careful not to overmix. Shape into 1 1/2" patties and brish both sides with oil. Cook in a large skillet over medium heat for 5 minutes on each side, until lightly browned.

Prune Ketchup (optional): Puree ketchup, juice and prunes in a small blender or food processor until smooth.

Serve on toasted buns with lettuce, onion and Prune Ketchup or kethcup.