01 -
Sprinkle both sides of chicken with salt and pepper. Heat oil in a skillet over medium-high heat, then cook each side for 6-7 minutes till fully cooked. Slice thinly after letting it rest away from the pan.
02 -
Slice up your avocado, shred the cheese you want to use, cut the red onion into thin rounds, and slice the tomato. Keep them handy.
03 -
Spread some mayo and Dijon underneath on each slice of your bread.
04 -
On one slice per sandwich, stack the layers—chicken, onion slices, your cheese, tomato layers, and avocado. Cover with the other slice of bread, mayo against the filling.
05 -
Start by heating a skillet to medium heat, tossing in olive oil or butter. Add your sandwich and cook until golden—pressing down lightly with a spatula till the cheese is gooey and melted, about 3-4 minutes per side.
06 -
Move the sandwiches off the heat. Wait a minute to slice them down the middle. Serve while warm.