Make ahead option - you can prepare the grilled corn ahead of time and simply store the kernels in the fridge until you are ready to make the salad.
Mandoline - if you search the word mandoline on my site you will see all of the recipes I've made using my mandoline (a worthwhile $14 investment).
Raw Zucchini - I have come to love the taste of raw zucchini - particularly in the company of a delicious dressing - but if it's not your thing, you could grill the strips along with the corn in a vegetable basket.
Sizing - I know many of you are growing your own gorgeous garden zucchini and I have seen some the size of an adult's head! If you are working with a huge zucchini just slice enough to reasonably accommodate your salad servings.
Non-grill option - if you don't have a grill or don't wish to use it for this recipe, simply use 1 cup of sweet corn kernels (you can boil the cobs or steam from frozen). If you wish you can also sauté some corn in a skillet with a splash of olive oil and a sprinkle of paprika.
Mayonnaise - I prefer a simple olive oil & egg mixture for mayonnaise which can be tricky to find in stores. (Even the one's that announce that they are made with olive oil almost always list soybean oil as the first ingredient). A combination of fat fear and a preference for cheap oil means that the more traditional whole ingredients are scarce on the shelves. Empire mayonnaise is one brand available at Whole Foods but you can also try your hand at making your own mayo - it's wonderfully simple - here is
one method.