Cheddar, Pear, & Caramelized Onion Galette

Prep time: 15 minutes
Cook time: About 1 1/4 hours

In a large skillet over medium heat, melt butter. Add onion and cook, stirring occasionally, until soft, about 5 minutes. Reduce the heat to very low, add vinegar, salt and pepper, and cook, stirring occasionally, until onion is golden, 25 to 35 minutes. Add more salt and pepper to taste and set aside to cool.

Preheat the oven to 400°F. Line a large rimmed baking sheet with parchment paper.

On a lightly floured surface, roll out dough to a 14-inch circle; transfer to the prepared baking sheet. Spread with mascarpone cheese, leaving a 2-inch border. Top with about half of Cheddar cheese, then onion and pears. Carefully fold dough border over to create a lip around fillings, crimping every inch or two. Bake for 25 minutes.

Sprinkle on remaining Cheddar cheese and walnuts. Continue baking until crust is golden and pears are tender, about 5 minutes. Set aside to cool 5 minutes before serving. Serves 6 to 8.

Note: This recipe would also be good with apples instead of pears.