Caramelized Onion and Grilled Pepper Burger

Ingredients

• 2 tablespoons of vegetable oil
• 1 red onion s, sliced
• ½ cup brown sugar
• salt
• pepper
• 1 chili pepper
• 1 green bell pepper
• 1 teaspoon honey
• 1 teaspoon balsamic vinegar
• ½ cup shredded cheddar
• ¼ cup shredded parmesan
• 2 burgers patties
• 2 burger buns
• bechamel sauce:
• 1 tablespoon butter
• 1 tablespoon flour
• ⅔ cup milk
• 1 teaspoon salt
• 1 teaspoon nutmeg