This savory summer galette is a most delicious way to showcase your bounty of peak season zucchini and yellow squash. Spiralizing summer squash for the filling gives this rustic tart a super fun look—it’s sure to be a stand out addition to any potluck or cookout spread. Accented with savory-sweet caramelized onions and cherry tomatoes, this “zoodle” filled galette is like a slightly more elegant, veggie-forward take on “spaghetti pie.” One spiralizer pro-tip for keeping excess moisture to a minimum: Once you’ve spiralized the zucchini and yellow squash, place the strands into a clean kitchen towel and give it a good squeeze, and then dump them into a colander placed over a large bowl while you prep the rest of your ingredients.
1 1/2 cups (about 6 3/8 oz.) all-purpose flour
2 teaspoons fresh thyme leaves
1 teaspoon table salt
6 tablespoons cold unsalted butter, diced
1/4 cup cold vegetable shortening, diced
3 tablespoons ice water
1 tablespoon unsalted butter
1 tablespoon olive oil
2 cups sliced sweet onion (about 1 large onion)
1/2 cup ricotta cheese
1/2 teaspoon lemon zest (from 1 lemon)
1 teaspoon table salt, divided
1 large zucchini (14 to 16 oz.), spiralized
1 large yellow squash (13 to 14 oz.), spiralized
1 teaspoon fresh thyme leaves
1/4 teaspoon black pepper
6 to 8 heirloom cherry tomatoes, halved
1 large egg
1 teaspoon water
How to Make It
Prepare the Crust: Pulse flour, thyme, and salt in a food processor until combined, 2 to 3 times. Scatter diced butter and shortening over top; pulse until mixture resembles coarse sand, 4 to 5 times. Drizzle with ice water; pulse just until mixture starts to clump together, 3 to 5 times.
Transfer dough to a work surface. Gather dough together, and knead until dough comes together, 3 to 4 times. Shape dough into a disc. Cover with plastic wrap, and chill 30 minutes.
Prepare the Filling: Heat butter and oil in a large skillet over low. Add onion, and cook, stirring just enough to keep from sticking or scorching, until golden brown and tender, 20 to 25 minutes. (The more you stir, the more onions will break down.)
Preheat oven to 375°F. Stir together ricotta, zest, and 1/4 teaspoon of the salt in a small bowl.
Remove dough from refrigerator; remove and discard plastic wrap. Place dough on a lightly floured piece of parchment paper, and roll dough into a 14-inch circle. Spread ricotta mixture evenly over dough, leaving a 2-inch border. Arrange spiralized zucchini and squash over ricotta mixture. Sprinkle evenly with thyme, pepper, and remaining 3/4 teaspoon salt. Top evenly with caramelized onions and tomatoes. Fold edges of dough up and over filling to partially cover.
Whisk together egg and water in a small bowl. Brush egg mixture over exposed dough. Place galette and parchment on a baking sheet. Bake in preheated oven until well browned, 45 to 50 minutes. Cut into 6 wedges.
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