Place all the ingredients in a glass container and whisk together. Taste and adjust seasoning. Cover and store in the fridge.
For the ciabatta
Preheat the barbecue to high and oil the grill.
In a large bowl, toss the zucchini, peppers, and eggplant in olive oil. Season with salt and pepper.
Grill the vegetables until tender, 3-4 minutes each side. Remove from the grill. Toast the buns on the grill, cut side down, 1 minute or until light grill marks appear.
Slather the buns with the sun-dried tomato mayonnaise, to taste. Top with the grilled veggies, Saputo Mozzarella Fresca cheese slices, and basil leaves.