Preheat oven to 400 degrees F.
Line a baking sheet with a piece of parchment paper and place the rectangle of puff pastry in the center.
Coat the underside only of an 8-inch square baking pan with nonstick cooking spray and center the pan on top of the puff pastry.
Fill the pan with dried beans or pie weights.
With a sharp, small knife, score the puff pastry, tracing around the outside of the 8-inch baking pan. Do not cut all the way through the pastry. Leave the weighted pan on top of the puff pastry, and place in the preheated oven.
Bake the pastry for 20 minutes, then remove the pan from the oven. Carefully remove the smaller, weighted pan from the pastry and set aside. Place the baking sheet and pastry back in the oven and continue baking until the crust is golden brown, another 5 to 10 minutes. Remove from the oven and let cool completely.
Meanwhile, core and slice the tomatoes about 1/8-inch thick and place on paper towels to let drain.
Soften the cheese by mixing it in a small bowl with a fork. If needed, add a tablespoon or two of milk, cream or half-and-half to the cheese to make it spreadable.
Spread the cheese evenly over the center of the cooled tart, as defined by the scored markings. Shingle the tomato slices over the top of the cheese. Sprinkle with salt, pepper and fresh herbs.
A series of intimate dinners called Twenty at the Tower continues this month in Fort Worth. This week, Chef Gwin Grimes shares her recipe for a tomato tart.