Tomato and Goat Cheese Tart

Preheat oven to 400 degrees. Line a rimmed baking sheet with parchment paper.

Roll out puff pastry to a 12-inch square and transfer to prepared baking sheet.

In a small bowl, stir together sour cream and mustard and season to taste. Spread over puff pastry. Fold over 1/2-inch border on all sides and press edges to seal. Refrigerate.

In a large skillet, melt butter over medium-high heat. Add green onions and season to taste. Cook, stirring frequently until soft, about 3 minutes. Arrange green onions over sour cream mixture. Top with tomatoes and season with salt and pepper. Bake until pastry is golden brown and crisp, about 25 minutes. Cool slightly and top with goat cheese and herbs. Serve warm or at room temperature.