I put a very thin layer of butter on the wrap or flatbread, then a large romaine lettuce leaf before the chicken salad. The young man I cook lunch for doesn't eat both wraps the same day, so the lettuce keeps the mayo from soaking into the wrap. The lettuce doesn't get soggy if it's patted dry. I use dried cherries or cranberries instead of grapes in chicken salad for sandwiches. His has pecans, too, but kids might not care for that.