Begin with lining your tart mold with desired crust. Use a plain pie dough or other pastry dough appropriate for savory applications.
Slice the tomatoes evenly. Using different colored tomatoes will enhance the look of the finished tart.
Sprinkle the mozzarella over the bottom.
Evenly distribute the shredded cheese over the bottom of the tart mold.
Arrange the tomatoes over the cheese. If using more than one color of tomatoes, decoratively lay them in a pattern.
Sprinkle the top with kosher salt and black pepper, and bake in a preheated 350° oven until the crust is golden brown, about 25 to 30 minutes. Check the tart after 20 minutes.
Cool the tart completely. Unmold. Drizzle the tart with olive oil and top with fresh basil. Cut into serving sized portions and serve.