Trim fat from beef and cut into 1 ½ inch cubes. Pat dry with paper towel.
In a large skillet over medium high heat, pour oil and wait for it to get hot.
Add beef cubes and sear all sides 2-3 minutes. Work in batches.
Remove beef and place into the slow cooker.
Turn heat down to medium then add onion, garlic to the skillet and quickly saute for 2 minutes.
Add tomato paste, thyme, bay leaves, Worcestershire sauce, salt and pepper then and pour in 1 cup of broth and deglaze the pan. Bring to a boil.
Pour skillet content into the slow cooker, Add remaining beef broth, cover and cook on low for 6-8 hours or high for 4-6 hours.
Before cooking time ends by one hour, check to see if beef is done.
Remove beef and bay leaves, discard bay leaves and shredded beef on a plate.
Stir beef back in, check seasoning.
If the sauce is too watery for your liking make a slur. In a small bowl or cup add cornstarch and about 3 Tablespoons of cold water, stir to combine then pour over the mixture in the slow cooker.
Stir everything well and serve over cooked noodles.