Place the chicken breast halves in between plastic wrap and use a meat mallet or rolling pin to gently pound them until thin.

Place a skillet over medium-high heat and coat with oil. Add breadcrumbs to a shallow bowl. Add eggs to another shallow bowl and beat well. Dip the chicken in the egg mixture on both sides, and then coat with breadcrumbs on both sides. Place in the pan with the hot oil. Cook for a a few minutes on one side, until browned, then flip and cook on the other side until cooked through.

Slice the ciabatta rolls in half and toast them.

On the inside top half of the roll, spread a thin layer of mayonnaise, followed by a thin layer of refried beans and then a thin layer of mashed avocado. Top the bottom half of the roll with cooked chicken, a few strings of mozzarella cheese, and a few pickled jalapeños. Sandwich the roll together. Serve immediately.