Toast bread in your toaster until golden, you may need to cook it in two batches. Let cool completely.
In a small bowl, whisk together mayonnaise, salsa, green chiles, and sour cream until smooth and well combined. Stir in jalapenos.
Place bread slices on a cutting board. Spread one side of a slice of bread with half of the sour cream sauce. Layer the lettuce on top of the sour cream sauce. Place two slices of turkey on top of the lettuce, covering the bread slice.
On the second bread slice, layer the avocado slices evenly over the bread and top with two slices of turkey, cover the bread slice.
Spread the remaining sour cream sauce on one side of the last piece of bread.
Place the avocado bread slice on top of the lettuce bread slice (bread side down), and the top with the sour cream sauce bread slice, sauce slide down.
Cut sandwich into 4 squares. Stack two squares on top of each other and skewer each of the two stacks. Serve immediately.