This is a copycat of Kneader's turkey bacon avocado sandwich except we subbed the turkey for rotisserie chicken. The copycat sauce was just as good and has just 3 simple ingredients!
In a small bowl, stir together: 1/2 cup mayo, 2 Tbsp sour cream and 2 tsp mustard.
How to Assemble the Chicken Sandwich:
Focaccia bread, Sauce, Provolone Cheese, Chicken, bacon, lettuce, tomato, purple onion, avocado, salt & pepper and top it with the second piece of focaccia spread with sauce.
Slice the sandwich in half and serve. This is a sandwich you'll make again and again. Keep this one in mind when you have company over and you want to impress them but don't have a ton of time to cook :).
Notes
If you can't find focaccia, use your favorite artisan bread - you'll love it just as much