Homemade Onion Soup 'Au Gratin'
From: Colette, Joliette, Quebec, Canada
Servings: 4
IngredientsPreparation
  • 2 tablespoons [30 g] butter
  • 2 tablespoons [30 mL] vegetable oil
  • 4 large onions, sliced
  • 4 slices toasted bread
  • 4 slices Mozzarella cheese
Broth
  • 4 cups [1 L] water
  • 1/2 teaspoon [2.5 mL] salt
  • 1 teaspoon [5 mL] thyme
  • 4 tablespoons [60 mL] liquid beef broth concentrate
  • Into a casserole, brown onion slices into hot melted butter and vegetable oil.
  • Combine all broth ingredients.
  • Pour broth over onion slices.
  • Bring to a boil and leave to simmer for 30 minutes.
  • Preheat oven to 400F [200C].
  • Pour soup into individual oven-safe soup bowls.
  • Remove crusts from toasted bread slices.
  • Arrange one toast on top of onion soup into each bowl.
  • Top each with 1 slice Mozzarella cheese.
  • Melt cheese into a preheated oven until golden, watching carefully.