Season avocado with salt and pepper to taste. Set aside.
Butter each slice of bread and place butter side down in a large skillet. Spread mayonnaise on each unbuttered side of bread. This will make the grilled cheese nice and creamy.
Add the avocado, tomato and pepper jack cheese on two slices of bread.
Fold the sandwiches together and cook on medium heat for 2-3 minutes on each side. If they are getting brown and the cheese has not melted turn the heat down or cover the pan.
Serve immediately and enjoy!
Notes
Original recipe from chefsavvy.com. Please do not publish my recipe or pictures without linking back to the original post. Thank you!