01 -
Sprinkle salt and pepper on chicken. Heat oil and cook both sides 6-7 minutes until fully cooked. Let it rest, then cut into thin strips.
02 -
Cut the tomato, onion, and avocado into slices. Set cheese aside.
03 -
Spread mayo and mustard on the bread. Stack chicken, cheese, avocado, tomato, and onion inside.
04 -
Butter up a pan and warm your sandwiches for about 3-4 minutes. Flip them and press lightly until they're crispy and the cheese is melted.
05 -
Slice them in half, cool a bit, and enjoy while they're warm.