Preheat the oven to 400°.
On a lightly floured surface, roll the dough to an 11-inch round. Gently ease the dough into a 9-inch glass pie plate. Trim the dough edge, leaving a 1/2-inch overhang; crimp the edge. Bake until lightly browned, 10–12 minutes. Transfer the crust to a wire rack to cool.
Reduce the oven temperature to 375°.
Sprinkle 1/4 cup cheese blend evenly on the bottom of the cooled crust; top with the tomato slices, overlapping to fit. Sprinkle the tomatoes with the salt and top with the basil.
Combine the mayonnaise, scallions, hot pepper sauce and the remaining 1/4 cup cheese blend in a medium bowl until blended; spread over the tomatoes, leaving a 1-inch border around the edge. Sprinkle with the Parmesan cheese. Bake, uncovered, until the filling is hot and the top is browned and bubbly, 30–35 minutes.
Test Kitchen Tip:
Plum tomatoes are meatier and contain less water than regular tomatoes. For a delicious smoky flavor, sprinkle the tomatoes with 2 slices of cooked, crumbled turkey bacon before baking. Two slices will increase the nutritional value by 20 calories and 2 grams of fat per serving.