This recipe makes HUGE burgers. Next time I will make them thinner/smaller. I did the patties on the Foreman grill. We enjoyed the flavors so much I'm making the burgers again this week, only I'm trying turkey, and bacos!
Score meat with the side of your hand to separate into 4 equal amounts. Make 4 large patties, 3/4 to 1 inch thick. Drop each patty onto the plate you poured olive oil on and coat with oil and place on hot grill pan, griddle or in skillet. Cook 5 minutes on each side, until chicken is cooked through.
Top patties with reserved cooked Canadian bacon and Swiss cheese. Fold each slice of cheese in half to fit the burger. Cover loosely with tin foil. Turn off pan and let cheese melt, 2 minutes.
Combine mayonnaise (or reduced fat mayonnaise, eyeball it), mustard, tarragon. Slather bun tops or English tops with sauce. Place Cordon Bleu burgers on bun bottoms and top with lettuce and tomato. Put bun or muffin tops in place. Serve with fries.