Roast Beef with Potatoes and Carrots

1- 7 bone roast or other inexpensive beef roast
3  unpeeled potatoes of your choice
3  peeled and chopped carrots
1  large cut up onion
1  can whole kernel corn
1/2 t each - salt, pepper, garlic powder
1  bay leaf


Place all in crock pot
Cover with water
Low 7 - 8 hours
30 minutes before you're ready to eat;
mix 3 1/2 T of flour with a 1/2 C milk, pour into crock pot and stir.