I always start by setting my oven to 400 degrees F so it's fully heated by the time my tart is assembled. A hot oven is what gives puff pastry that dramatic rise and crisp, golden finish. While it heats, I use the time to prep my pastry and pears.
On a lightly floured surface, I unroll my puff pastry sheet and gently smooth out any fold lines with a rolling pin. Using a paring knife, I score a rectangle about half an inch from the edge, cutting only partway through the dough. This border is what puffs up around the filling as it bakes.
In a small bowl, I whisk together the melted butter, brown sugar, minced ginger, vanilla extract, and cinnamon until it's smooth. This glaze is really the flavor backbone of the whole tart, so I make sure it's well combined. I set a little aside for brushing over the pears later.
I brush a generous layer of the butter mixture over the scored rectangle, staying inside the border I cut. This keeps the center from staying pale while the edges turn golden. I save the rest of the glaze for the top layer.
I thinly slice my pears, removing the cores as I go, then toss them in fresh lemon juice right away. This step keeps them looking bright instead of turning brown while I finish assembling everything. I like my slices thin enough to fan out easily.
I layer the pear slices in slightly overlapping rows inside the scored rectangle, then brush the remaining glaze over the top. I gently pinch the pastry edges all the way around to seal in the filling. This little border is what creates that beautiful puffed frame.
I place my tart on a parchment-lined baking sheet and slide it into the oven for about 18 minutes. I watch for the pastry to turn a deep golden brown with crisp, puffed edges. Once it's out, I let it cool for a few minutes before slicing.