French Onion Smash Burger Tacos Recipe by Tasty

Ingredients

• 2 tablespoons unsalted butter
• 1 large yellow onion, sliced
• 1 teaspoon kosher salt
• ½ lb lean ground beef
• ¼ cup store-bought onion dip mix
• 1 teaspoon freshly ground black pepper
• 1 teaspoon red pepper flakes
• 4 taco-size flour tortillas
• Freshly grated Gruyère cheese
• worcestershire sauce
• 1 large handful arugula
• balsamic glaze