It is a very interesting combination.
Since you like the idea of using strawberries, instead of jam, have you ever thought of making your own unique strawberry chow chow or something like that ?
I was reading your ingredients but when I got to "Smucker's strawberry jam".....I paused. I see that you may be looking for a fruit/color infusion but just thought if you eliminated "jam" it might get more ......well, its just a thought.
If your sandwich is selling, then all the more power to you.
Petals.