Easy French Onion Soup with Whole-Grain Cheese Toast CATBIRD!! Recipe | Say Mmm

Ingredients

• 1 tablespoon extra-virgin olive oil
• 2 large onions, halved and thinly sliced
• Kosher salt
• 1/4 cup dry white wine
• 1 tablespoon soy sauce
• 6 cups beef stock or low-sodium broth
• Four 1 / 2-inch-thick slices of whole-grain baguette
• 1/4 cup freshly grated Gruyère cheese