Healthy Makeover: French Onion Soup

Name: Healthy Makeover: French Onion Soup
Ingredients: 1 tablespoon(s) extra virgin olive oil; 3 large (10 to 12 ounces each) red onions, very thinly sliced; 3 sprig(s) fresh thyme; Salt; Pepper; 1/2 cup(s) dry red wine; 1 can(s) (14- to 14 1/2-ounce) lower-sodium chicken broth (1 3/4 cups); 2.25 cup(s) water; 2 teaspoon(s) lower-sodium soy sauce; 4 slice(s) (1/2-inch thick each) whole wheat baguette; 1 teaspoon(s) cornstarch; 1.25 ounce(s) shredded Gruyère cheese (1/4 cup); 4 slice(s) reduced-fat Swiss cheese