I normally don't buy pre-made sorts of things like salad dressing, special condiments, etc. But I've been eying Lemonaise by The Ojai Cook. So I finally caved and bought some. Yummy! I've used it with tuna sandwiches, egg salad, fish sticks, and steamed shrimp.
It imparts a lighter, lemony (obviously), slight mustardy tang that will be great with summer dishes. Definitely recommend.