Begin by combining all the russian dressing ingredients in a bowl. Mix together well and taste for seasoning, Adjust as necessary. Set aside.

To make the sandwich, first drizzle a small amount of oil in a skillet and heat the pastrami. The meat is cooked already, but still needs to be heated up. This takes a minute. When done, remove to a plate and set aside. Then heat up the sauerkraut for a few seconds until heated through. Set aside.

Butter 1 Tb on 1 side of bread and the other Tb of butter on the other piece of bread. In the same skillet, toast the bread, butter side down. Then spread on 1-2 TB of Russian dressing on 1 slice of bread, then add the pastrami, sauerkraut and cheese. Top the sandwich the 2nd slice of bread.

Cover pan with a lid so that the cheese can melt, about another minute.

When done, cut sandwich in half and serve with your favorite pickle.