French Onion Soup Melting Onions
This French onion soup melting onions recipe combines tender caramelized onions, melted cheese, and crispy breadcrumbs for a nutrient-packed, gluten-free-friendly dish that's easy and delicious.
Ingredients
- 2 tablespoons extra-virgin olive oil
- 2 tablespoons unsalted butter, melted, divided
- 1 tablespoon plus ½ teaspoon chopped fresh thyme, divided, plus leaves for garnish
- ½ teaspoon salt
- ½ teaspoon ground pepper
- 3 large sweet onions (12 oz. each), peeled and sliced 1-inch thick
- ⅓ cup panko breadcrumbs
- ½ cup lower-sodium beef broth
- 1 tablespoon sherry vinegar
- ½ cup shredded Gruyère cheese
- ½ cup shredded low-moisture part-skim mozzarella cheese
Instructions
- Preheat your oven to 450°F, positioning the rack in the upper third.
- In a small bowl, whisk together olive oil, 1 tablespoon melted butter, 1 tablespoon thyme, salt, and pepper.
- Arrange the onion slices in an even layer in a broiler-safe 9-by-13-inch metal baking pan. Brush the butter mixture over the onions.
- Roast for 30 minutes, flipping the onions once halfway, until golden and slightly tender.
- In the same small bowl, combine panko breadcrumbs with the remaining melted butter and ½ teaspoon thyme. Toast the mixture in a skillet over medium-high heat for 2-3 minutes until golden and fragrant. Set aside.
- Flip the onions again, then pour in the beef broth and vinegar. Roast for an additional 10 minutes until the liquid reduces and the onions are soft.
- Switch the oven to broil. Sprinkle the cheeses evenly over the onions, and broil for 1 minute until melted and bubbling.
- Top with the reserved panko mixture and garnish with thyme leaves before serving. Enjoy as-is or alongside a fresh salad for a complete meal!