French Onion Deviled Eggs Recipe by Tasty

Ingredients

• 4 tablespoons unsalted butter
• 6 large yellow onions, thinly sliced
• 1 cup dry rosé wine
• 2 tablespoons balsamic vinegar
• 2 tablespoons worcestershire sauce
• 1 tablespoon all-purpose flour
• 4 cups beef stock
• 12 hard-boiled eggs, peeled
• 3 tablespoons mayonnaise
• 1 teaspoon garlic powder
• 1 teaspoon kosher salt
• 3 tablespoons unsalted butter
• ½ cup panko bread crumbs
• 2 tablespoons chopped fresh rosemary leaves
• 1 tablespoon chopped fresh thyme leaves
• ½ cup grated gruyere cheese