Spicy Onion Panini with Basil and Roasted Red Pepper - National Onion Association

Ingredients

• 8 cups (2 quarts) yellow onion, sliced
• 2 tablespoons olive oil
• 1 teaspoon red pepper flakes
• 4 ciabatta rolls
• Aioli (recipe follows)
• 1 cup basil leaves
• 1 cup roasted red pepper strips
• 8 ounces sharp white Cheddar, sliced
• 1/2 cup pitted Kalamata olives, halved
• 2 ounces prosciutto or pancetta, in paper-thin slices (optional)