Preheat oven to 400°. Cut beef into 1-inch strips. Line bottom and sides of a 13- x 9-inch pan with aluminum foil, allowing 2 to 3 inches to extend over sides. Place beef in a single layer in pan. Pour 1 cup beef broth over beef. Cover tightly with aluminum foil.
Bake at 400° 1 hour or until beef is shreddable. Remove beef from pan, reserving drippings. Shred beef with 2 forks.
Sauté onion and next 5 ingredients in hot oil in a Dutch oven over medium heat 5 minutes or until onion is tender. Stir in shredded beef, reserved pan drippings, beans, next 4 ingredients, and remaining beef broth. Bring to a boil; cover, reduce heat to medium-low, and cook, stirring occasionally, 45 minutes. Serve with desired toppings and lime wedges.
Very tasty. However, I will substitute chuck roast in place of the flank steak next time I make it. Flank is very expensive and not worth the extra dollars. I think chuck is a tastier and less costly substitution.
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