Preheat the oven to 400 degrees F. Unfold the puff pastry onto a floured piece of parchment paper and roll out into a 9-by-11-inch rectangle. Score1/2 inch in from the edge, all the way around, using a paring knife. Slide the pastry (on the parchment) onto a baking sheet. Poke the middle all over with a fork, then bake until golden brown, 20 to 25 minutes. Transfer to a rack and let cool completely.
Meanwhile, combine the cream cheese, sour cream, lemon zest, lemon juice, sugar, 1/2 teaspoon salt, and pepper to taste in a large bowl and beat with a mixer on medium speed until smooth; stir in the chives. Spread evenly over the cooled crust. Arrange the tomatoes on top; season with salt and pepper and top with more chives.
Customize this tart with your favorite toppings. For our cover, we added grilled corn.
Photograph by Ryan Liebe
Courtesy of Food Network Magazine