One advantage to claiming tomato as a fruit is that strawberries with a nice combo of romaine lettuce and black olives topped off with a lite raspberry vinaigrette is not so weird.
Ages ago I was on a plane trip to a two-week vacation in the southwest and I found this interesting food article in the pocket in front of me. It discussed the use of the acidic strawberry as a replacement for tomato in some sauces. I had to wait to get home to my own kitchen before experimenting a bit with some combinations with that fruit: basil, thyme, and even blue cheese. It made a really nice sauce for baked fish too.
Catholic Sensibility 
Black grapes (which are more tannic than red or green grapes make an OK substitute for tomatoes in salads in the off season for the same reason.