Place round steak in a 3-quart slow cooker. In a small bowl, combine the tomatoes, onion, garlic and seasonings; pour over steak. Cover and cook on low for 8–9 hours or until meat is tender.
Remove meat from slow cooker. Add beans to tomato mixture. Cover and cook on high 30 minutes or until beans are heated through.
When cool enough to handle, slice meat. In individual bowls, layer the rice, meat and bean mixture. Top with cheese, olives, onions and guacamole.