How to Make Betty's slow cooker pot roast with brown gravy

Betty's at it again with a super-simple pot roast recipe that you can make in your crock pot. When's dinner?

Ingredients:

1 1/2 pounds top round beef roast (I used Laura's Lean Beef.)
freshly ground black pepper, to cover roast on all sides
1 1/2 tablespoons vegetable oil (I used peanut oil.)
3 medium to large-sized russet potatoes, peeled and cut into quarters (Any variety of potato will work.)
2 medium onions, peeled and cut into sixths (I used white onions.)
1/2 oz. small cellophane package of baby carrots (You may use any carrots, peeled and cut in pieces.)
10.5 oz. can beef broth
10.5 oz. can beef consomme
1/2 of a 6 oz. can of tomato paste (Use the whole can, if you like a more tomato-y flavor.)
1/2 cup water
3 tablespoon cornstarch