Brisket in Ale

1 3- to 4-pound fresh beef brisket 2 medium onions, thinly sliced and separated into rings 1 bay leaf 1 12-ounce can beer 1/4 cup chili sauce 2 tablespoons no-calorie, heat-stable, granular sugar substitute (Splenda) 1/2 teaspoon dried thyme, crushed...