Turn the oven on the high broil setting (or turn on the toaster oven if you have one)

Place bread on a baking sheet and lace baking sheet on the top rack in the oven. Broil for 1 to 2 minutes, or until the bread is golden-brown and crispy.

Remove bread from oven, flip it over, and add cheese slices to each piece. Place sheet back in the oven and heat until melted, about 1 to 2 minutes.

Spread pesto sauce over each piece of bread, then layer with turkey and avocado. Cut sandwich in half and enjoy!