Sauté beef in oil in 4-quart pot until meat changes color but doesn't brown,
8 to 10 minutes. Combine chili powder, cumin and flour in cup. Add with garlic to
beef; stir to coat meat. Add oregano.
Combine broth and water in bowl. Add 1 1/2 cups broth mixture and pepper to meat.
Simmer, partially covered, 1 1/2 hours, stirring. Add remaining broth mixture to
meat; simmer, partially covered, 30 minutes or until meat is very tender.
Add beans; heat through. Garnish with sour cream and lime.