James Martin’s Pear Tarte Tatin is a delicious upside-down tart made by caramelizing pears in butter and sugar, then covering them with a puff pastry crust before baking. Once cooked, the tart is inverted to reveal beautifully caramelized pears on top. The contrast between the crispy puff pastry and the soft, sweet pears makes this dessert irresistible.