Add the beef stew meat to the bottom of the slow cooker.
Layer the potato chunks, diced onion, sliced carrots, and minced garlic over the beef.
Sprinkle the chopped rosemary, salt, and black pepper across the vegetables.
Pour the crushed tomatoes and beef broth into the slow cooker, then add the bay leaf.
Stir gently to combine the ingredients without breaking up the potato chunks.
Cover and cook on low for 8 hours until the beef is very tender.
Remove the bay leaf before serving.