Spread a thin layer of butter on 2 slices of bread. The third slice with be buttered on both sides; this will be the center slice.
Lay 2 layers of pastrami. Make sure the surface of the bread is covered.
Spread an even layer of coleslaw.
Spread a thin layer of dressing.
Top with swiss cheese.
Lay the center slice of bread (the one that is buttered on both sides) on top of the cheese.
Lay 2 layers of the turkey.
Add coleslaw, dressing, swiss cheese, and top with the third slice of bread.