Heat the olive oil in a skillet over medium heat. Add the beef cubes and brown them on all sides for about five minutes.
Place the browned beef into the slow cooker. Add the carrots, potatoes, parsnip, rutabaga, and onion.
Stir in the minced garlic, thyme, rosemary, salt, and pepper. Pour the beef broth over everything.
Cover and cook on low for eight hours until the beef is tender and the vegetables are soft.
Stir the stew once before serving to distribute the broth evenly.