Ingredients

  • 6 large onions, halved and sliced crosswise (6 1/2 cups)
  • 1 1/2 Tbs. grapeseed oil
  • 1 tsp. kosher salt
  • 1/2 tsp. white pepper
  • 3 cloves garlic, minced (1 Tbs.)
  • 4 cups low-sodium vegetable broth
  • 1 Tbs. chopped fresh thyme
  • 1 1/2 tsp. red wine vinegar
  • 18 1/4-inch-thick slices baguette
  • 2 tsp. olive oil
  • 3/4 cup grated Gruyere or Swiss cheese

Method

  • Preheat broiler.
  • Spray broiler tray with cooking spray.
  • Spread onions on broiler tray.
  • Drizzle with grapeseed oil, and sprinkle with salt and white pepper.
  • Broil 10 minutes, stir, then broil 10 minutes more, or until onions begin to brown.
  • Stir in garlic.
  • Broil 2 minutes more.
  • (Some onions will be slightly charred.)
  • Transfer onions to pot, and cover with broth and 2 cups water.
  • Bring to boil, stir in thyme and vinegar, reduce heat to medium-low, and simmer 10 minutes.
  • Meanwhile, arrange baguette slices in single layer on broiler tray lined with foil.
  • Drizzle with olive oil, and season with salt and pepper, if desired.
  • Sprinkle each slice with 2 tsp.
  • grated cheese.
  • Broil 2 minutes, or until cheese has melted and toast begins to brown.
  • Ladle soup into 4 bowls.
  • Float 3 toasts in each bowl.