Season meat on all sides with salt, pepper, and your favorite beef or steak seasoning.
Heat oil in a large skillet over high heat until shimmering. Place meat in the pan to sear for 2 minutes on each side, turning carefully with tongs. Transfer the seared roast to the crockpot.
Add onion, garlic, and beef broth to the crockpot, then cover with lid and cook on LOW for 8 hours until meat is tender.
Cook the egg noodles according to package directions.
Once the beef is tender, remove it from the crock pot and shred the meat using two forks, discarding any large pieces of fat. Return the meat to the crockpot, then add the noodles a handful at a time, stirring gently so the noodles don't stick together.
Serve hot, garnished with chopped fresh parsley, if desired.
Notes
NOTE: If needed, you can thicken the sauce by whisking 2 tablespoons of cornstarch with 2 tablespoons of water. Stir this slurry into the broth when adding the noodles. Stir again after 15-30 minutes and just before serving.