Butternut squash galette

step 1
Prepare Pastry-In a bowl, combine the flour and salt and add the butter, using a pastry blender, cut it in until the mixture resembles coarse meal. Make a well in the center. In a small bowl, whisk together the sour cream, lemon juice and water and add this mixture to the well. Stir until dough forms ball. Cover with plastic wrap and refrigerate for 1 hour.

step 2
Preheat oven to 375 degrees F. Peel squash and cut into 1 inch pieces. Toss pieces with olive oil and salt and roast on foil lined (for neatness sake) sheet for 20 minutes or until pieces are tender, turning it midway if your oven bakes unevenly. Set aside to cool slightly.

step 3
While squash is roasting, melt butter in a heavy skillet and cook onion over low heat with pinch of salt, stirring occasionally, until soft and lightly golden brown, about 15-20 minutes. Stir in cayenne.

step 4
Raise the oven temperature to 400 degrees. Mix squash, caramelized onions, cheese, pancetta and sage together in a bowl.

step 5
Assemble galette: On a floured work surface, roll the dough out into a 12-inch round. Transfer to a baking sheet with parchment paper. Spread squash, onions, cheese and herb mixture over the dough, leaving a 1 1/2-inch border. Fold the border over the squash, onion and cheese mixture, pleating the edge to make it fit. The center will be open.

step 6
Bake until golden brown, about 30 minutes. Remove from the oven, let stand for 5 minutes, then slide the galette onto a serving plate. Cut into wedges and serve hot, warm or at room temperature.