First, spread mayo on both side of the bread.
Now, to make the guacamole, mix and break up the avocado, red onion, jalapeno, mint, apple cider vinegar and salt in a bowl. Leave slightly chunky.
Next, top both inside slices of bread with 2 slices of cheese each.
Now add avocado 1/2 guacamole on top of cheese. Close the sandwich (repeat above instructions for second sandwich).
Next, cook on a dry medium heat skillet 2-3 minutes per side (Tip: when smell toast its times to flip).
Slice in half and Happy Eating!