Looks delicious! I think the marinade you used is a good idea; I have done them in thin strips and into a teriyaki marinade overnight, then BBQed. But yours look better!
My favourite new recipe for wild turkey breasts is to do them as schnitzels. Cut them lengthwise into about 4 pieces, pound them flat, dredge in seasoned flour, then egg wash, then panko crumbs and pan-fry. This was SUPPOSED to be one of our deer camp meals last week, but we basically got behind in our menu and never cooked that meal. More for me when I do cook it!
Doug