Begin by cutting the ripe avocado in half, removing the pit, and scooping the flesh into a mixing bowl. Mash the avocado with a fork until smooth and creamy, then mix in freshly squeezed lemon juice, a pinch of salt, and pepper to taste.

Take two slices of sourdough or artisan bread and spread a thin layer of mayonnaise on one side of each slice for added moisture. On one slice, generously layer the creamy avocado spread, followed by a heap of cooked shredded chicken, and finish with a slice of cheddar or Monterey Jack cheese. Place the second slice of bread on top, mayo side down, to create a delightful sandwich ready for toasting.

Preheat a skillet over medium heat and add a pat of butter, allowing it to melt and coat the bottom of the pan. Once the butter is bubbling and fragrant, carefully place your assembled Chicken Avocado Melt Sandwich in the skillet. Toast for 3-4 minutes, keeping an eye on the bread of the sandwich until it turns golden brown and the cheese begins to melt.

Using a spatula, gently flip the sandwich to toast the other side. You may need to press down lightly for an even crisp. Continue to toast for another 3-4 minutes until the bread is golden brown and crispy, and the cheese is fully melted.

Remove the sandwich from the skillet and let it rest on a cutting board for about a minute to allow the cheese to set slightly. Slice the Chicken Avocado Melt Sandwich diagonally for a pleasing presentation. Serve warm and enjoy with your favorite side.