Caramelized Onion and Butternut Squash Tart | Food52

This decadent tart is packed with caramelized onions, roasted butternut squash, Gruyère and crème fraîche. It makes an excellent vegetarian main or a rich, savory side. GET THE RECIPE ►► https://f52.co/2nexgJu

Serves: 6 to 8 as a main dish

INGREDIENTS
For the tart:
1 recipe pastry dough (see below)
1 large butternut squash, peeled, seeded, and cubed
1 tablespoon olive oil
2 large yellow onions, halved and sliced
3 tablespoons unsalted butter
2 eggs
8 ounces crème fraîche
4 ounces Gruyère, grated
2 ounces Parmesan, grated
1 teaspoon sea salt
1 teaspoon freshly ground black pepper
4 sprigs thyme

For the pastry dough:
3/4 cup all-purpose flour
1/2 cup whole wheat flour
1/4 teaspoon salt
1 stick butter
4 tablespoons ice water

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