How do you make your favorite sandwich?

I start off with a nice thick slice of Italian or white bread, preferably with sesame seeds in the crust. I then put a spread of ranch dressing mixed with a dash of Dijon mustard. I then put some sliced purple onions and some leaf lettuce. Some smokey sharp cheddar cheese to give it some kicks. The meat for this great sandwich would be a nice pink roast beef. Mmmm. I'm hungry. What do you make!