Heat the olive oil in a skillet over medium heat. Add the beef cubes and brown them on all sides for about 5 minutes, then transfer the meat to the slow cooker.
Add the potatoes, cabbage, carrots, and onion to the slow cooker with the beef.
Pour in the beef broth and add the salt and black pepper. Stir gently to combine.
Lay the thyme sprigs on top of the mixture.
Cover and cook on low for 7 to 8 hours, until the beef is fork-tender and the potatoes are soft.
Remove the thyme sprigs before serving.