01 -
4 bread slices (ciabatta, sourdough, or your pick)
02 -
4 cheese slices (cheddar, provolone, or Swiss)
03 -
1 ripe avocado, cut into slices
04 -
1 tablespoon olive oil for cooking
05 -
2 skinless, boneless chicken breasts
06 -
Salt and pepper as you like
07 -
2 teaspoons Dijon mustard
08 -
2 tablespoons mayo
09 -
1 small red onion, sliced thin
10 -
1 tomato, cut into slices
11 -
Butter or a splash of olive oil for toasting