For the dough: Pulse the flour and salt together in a food processor. Add the butter and pulse about 10 times until the mixture resembles coarse cornmeal with a few bean-size bits of butter in it. Add the egg and pulse 1 to 2 times more; don't let the dough form a mass around the blade. If the dough seems very dry, add up to 1 tablespoon of cold water, 1 teaspoon at a time, pulsing briefly. Remove the blade and bring the dough together by hand. Shape the dough into a disk, wrap it in plastic wrap, and refrigerate at least 1 hour.
For the filling: Halve and core the apple. Cut each half into 8 wedges and put them in a large bowl. Slice the squash and cut the onion into wedges so that both are as thick as the apple wedges and add them to the apples. Add the butter, rosemary, and thyme and toss gently to combine. Season with salt and pepper and toss again.
Preheat the oven to 400 degrees F.
Roll the dough on a lightly floured surface into a 12-inch disk. Transfer the dough to a baking sheet and brush with mustard. Starting 2 inches from the edge, casually alternate pieces of apple, squash, and onion in overlapping circles-if you have extra pieces of one or another, tuck them in where you can or double them up to use all the filling. Fold and pleat the dough over the edge of the filling. Bake until the crust is brown and the apple, squash, and onions are tender and caramelized, about 55 minutes. Scatter the cheese over the filling and bake until melted, about 5 minutes more. Cool the galette briefly on a wire rack. Cut into wedges and serve.
Know-How: Don't be afraid to cook this galette-or any of your pies or tarts, for that matter-until the crust is a rich golden brown. A pastry's buttery taste and flaky crispness really come through when it is fully cooked.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	373.49 Kcal (1564 kJ)
Calories from fat	227.35 Kcal
		% Daily Value*
Total Fat	25.26g	39%
Cholesterol	90.31mg	30%
Sodium	111.92mg	5%
Potassium	263.86mg	6%
Total Carbs	31.75g	11%
Sugars	2.63g	11%
Dietary Fiber	2.53g	10%
Protein	5.35g	11%
Vitamin C	17.6mg	29%
Vitamin A	0.8mg	28%
Iron	1.2mg	7%
Calcium	49.5mg	5%

Amount Per 100 g
Calories	214.35 Kcal (897 kJ)
Calories from fat	130.48 Kcal
		% Daily Value*
Total Fat	14.5g	39%
Cholesterol	51.83mg	30%
Sodium	64.23mg	5%
Potassium	151.43mg	6%
Total Carbs	18.22g	11%
Sugars	1.51g	11%
Dietary Fiber	1.45g	10%
Protein	3.07g	11%
Vitamin C	10.1mg	29%
Vitamin A	0.5mg	28%
Iron	0.7mg	7%
Calcium	28.4mg	5%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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