- In sauté pan, warm pastrami over medium heat until heated through. Set aside. Butter one side of each of the 8 slices of bread, then evenly spread reubenaise on the non-butter sides of the bread.
- In a large-size sauté pan or griddle, place butter sides down over medium heat. Cook until bottoms are golden brown. Top 4 of the slices with pastrami, then with 2 slices each of Swiss cheese. On the other 4 slices, evenly divide and top with sauerkraut. Marry the sauerkraut slices with the pastrami slices and cut in half.
Reubenaise / Combine all ingredients and mix well.