Heat up non-stick skillet on medium high heat. Add oil. Sprinkle chuck roast on all sides with salt and pepper and flour. Cook for about 2 minutes on each side of the meat.
Dump cooked meat and everything in the pan into a crockpot. Add the potatoes, onion and carrots.
Mix beef stock, tomato paste, and Worchestershire Sauce together and pour over meat and vegetables.
Toss a bay leaf into the crockpot. Put the lid on and turn it on low. Cook for 6-8 hours.