Five-Onion Soup

Ingredients

• 1/2 cup butter
• 2 white onions, halved and sliced
• 1 red onion, halved and sliced
• 5 shallots, sliced
• 1/2 bunch fresh thyme sprigs
• 1/2 teaspoon caraway seeds
• 6 cups chicken stock or broth
• 2 cups veal or beef broth
• 1 teaspoon salt
• 1 teaspoon coarsely ground black pepper
• 1 (12-ounce) loaf French bread, sliced and toasted
• 1/2 cup (2 ounces) shredded Gruyere cheese
• 4 green onions, sliced
• 1/4 cup chopped fresh chives