Preparation

• Position a rack in the center of the oven and heat the oven to 425°F.
• Sprinkle a 12×17-inch sheet of parchment with 2 Tbs. of the semolina flour. On the semolina, pat the biscuit dough into a 5-inch round. Using a floured rolling pin, roll the dough into a 13-inch round, lightly dusting with all-purpose flour to keep the dough from sticking, if necessary.
• Transfer the dough on the parchment to a large rimmed baking sheet. Sprinkle the remaining 2 Tbs. semolina flour over the dough, leaving a 1-1/2-inch border.
• Arrange the tomatoes over the dough in two flat, slightly overlapping concentric circles, lightly salting each circle as you go.
• Combine the cheese, mayonnaise, herbs, and 1/8 tsp. pepper in a small bowl. Dollop in generous tablespoons over the tomatoes. Fold the dough border over the edges of the tomatoes, pleating the dough as necessary.
• Bake until the crust is golden-brown and the tomatoes are tender, 20 to 25 minutes. Let cool on a wire rack until warm, about 30 minutes, before cutting into wedges and serving. You can also serve it at room temperature.