Place bun in a food processor; process 4 times or until crumbs measure about 1 cup. Transfer to a bowl.
Combine 1 tablespoon oil, garlic, and beans in processor; pulse 8 times or until beans make a thick paste. Scrape bean mixture into bowl with breadcrumbs. Stir in rind and remaining ingredients. With moistened hands, divide bean mixture into 4 equal portions (about 1/3 cup mixture per portion), shaping each into a 3-inch patty.
Heat remaining 2 tablespoons oil in a large nonstick skillet over medium-high heat. Add patties to pan; reduce heat to medium, and cook 4 minutes or until bottom edges are browned. Carefully turn patties over; cook 3 minutes or until bottom edges are done.