Food & Cooking Recipes Dessert & Treats Recipes Pie & Tarts Recipes Individual Potato-and-Onion Tartes Tatin 2.2 (15) 3 Reviews By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on July 27, 2011 Print Rate It Share Share Tweet Pin Email Yield: 6 5-inch tartlets Ingredients 4 tablespoons (½ stick) unsalted butter, cold, cut into small pieces, plus more for pans All-purpose flour, for dusting 1 (17 ¼-ounce) standard package store-bought puff pastry 4 medium yellow onions, peeled, cut into ¼-inch-thick rounds 5 small new potatoes, peeled Coarse salt and freshly ground pepper ¼ cup balsamic vinegar Pinch of sugar Directions Very generously butter six 5-inch round metal pie plates; set aside. On a lightly floured work surface, roll out puff pastry to a scant 1/4-inch thickness. Using a cutter or a small plate as a guide, cut dough into 4 1/2-inch rounds. Prick rounds all over with a fork. Transfer to a parchment-lined baking sheet; chill until firm, about 30 minutes. Meanwhile, preheat oven to 425 degrees. Lay two or three onion rounds on the bottom of each pie pan. Using a mandoline or sharp knife, slice potatoes into thin rounds, about a scant 1/4 inch thick. Place potato slices, slightly overlapping, over the onion in two layers of concentric circles (they should completely cover the onion). Sprinkle potatoes generously with salt and pepper. Place chilled puff pastry rounds on top of the potatoes in each pie plate. Bake until golden brown, about 20 minutes. Immediately invert tartlets onto a platter. In a small saucepan, combine balsamic vinegar and sugar. Bring to a simmer and cook until mixture reduces to a syrup, about 4 minutes. Whisk in butter, a piece at a time, until incorporated. Season with salt and pepper. Glaze tartlets with balsamic syrup and serve warm. Rate it Print