Remove from oven and sprinkle 1/2 cup Mozzarella on bottom. Let cool.
While crust is cooling, cut tomatoes into slices (about 1/4" thick or thicker if preferred) and drain on paper towel.
Spread layer of pesto over cheese.
Place tomatoes over pesto layer.
Combine mayo, Parmesan, pepper and remaining Mozzarella and spread on top.
Bake at 375 degrees for 35 minutes or until browned.
Notes
Pie Crust - the recipe calls for a store bought pie crust but feel free to make one from scratch if you prefer.Tomatoes - I prefer to use Roma tomatoes but any meaty tomato will do.Temperature - this tart is delicious served warm, room temperature or cold. You choose