Place zucchini, onion and garlic in a bowl with vinaigrette. Set aside.
Press pizza dough down into a flat round(ish) disc on a nonstick surface, such as non stick foil. Brush top with oil.
Wrap corn in a damp towel and place in microwave. Cook on high for 6 minutes. Allow to cool enough to handle. Remove husk and silk. It should peel away very easily.
Preheat grill to medium/high heat.
Remove vegetables from bowl with a slotted spoon and place on grill, on a grill tray or basket. Place corn on the grill as well. Remove garlic after just 2 minutes on grill, as not to burn. Grill remaining vegetables 7-10 minutes, occasionally turning. Remove from grill and set aside. Cut kernels from cob and place with other vegetables.
Place pizza dough directly on grill rack, oiled side down. Cook just 2-4 minutes, until nice grill marks are in place. Brush oil on the top of dough. Flip over using spatula and/or tongs. Layer ingredients on pizza, starting with the tomatoes and ending with the cheese. Once toppings are on pizza, reduce heat to medium/low and cover. Cook about 4-5 minutes until dough is firm and cheese is melted.
Garnish with torn basil leaves if desired.
Enjoy!