Caramelized Grilled Cheese - Custom Distributors | Custom Distributors Appliances

Ingredients

• - FOR THE CARAMELIZED ONIONS -
• 3 tablespoons butter
• 3 tablespoons olive oil
• 3 large yellow onions, halved, sliced 1/4-inch thick
• 1 - 2 tablespoons water (optional)
• 1 tablespoon brown sugar
• 1 tablespoon balsamic vinegar
• 1/8 teaspoon salt
• 1/8 teaspoon pepper
• 1/8 teaspoon red pepper flakes
• - FOR THE SANDWICHES -
• 8 large sourdough slices, 1/2-inch thick
• 1/3 cup mayonnaise
• 4 ounces goat cheese, at room temperature
• 8 ounces shredded Gruyere cheese, at room temperature
• 1 jar sliced pickled beets, Aunt Nellie's brand preferred
• 2 cups baby arugula
• 2 tablespoons butter, divided
• 2 tablespoons olive oil, divided