First, spread mayo on the side of the sandwich that will be the outside of the grilled cheese.
Next, spread Russian dressing on insides side of slices of bread.
Now, add 2 slices of cheddar cheese, then pastrami, pickles, and top with another slice of cheese. Top with bread Russian dressing side down.
Next, place the grilled cheese on a non-stick pan on medium high for 2 ninutes per side. No need to add butter or oil because the mayo will toast the bread.
Finally, cheers to awesome grilled cheese.