Gluten-Free Spinach Tart
Directions
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Crust
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Using a food processor, pulse together potato flour, brown rice flour, flaxseed, thyme, salt and pepper until combined. Add butter; pulse until butter is size of peas, about 10 pulses. Blend egg with 4 tbsp (60 mL) ice water. Add to food processor; pulse just until dough comes together. If dough is still dry, add more water, 1 tbsp (15 mL) at a time.
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Preheat oven to 375°F (190°C). Crumble dough evenly around a 9-inch (23 cm) non-stick tart pan with a removable bottom. Using fingers, press dough to evenly cover bottom and side of pan; smooth surface by pressing with bottom of a measuring cup. Prick dough all over with a fork. Bake until golden brown, about 20 minutes. Let cool in tart pan on rack. Reduce oven to 350°F (180°C).
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Filling
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Meanwhile, in a large pot, cook spinach with 1/4 cup (60 mL) water over medium heat, stirring occasionally, until wilted, about 3 minutes. Drain well; let cool. Lay spinach in single layer on a tea towel; roll towel into a log. Twist and squeeze towel to drain as much excess water as possible. Coarsely chop spinach and transfer to a large bowl. Dry pot and return to heat; add 1 tbsp (15 mL) oil. Sauté shallots and zucchini until softened, 3 to 4 minutes. Add to spinach.
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Whisk together egg, goat cheese, salt and pepper. Add egg mixture to spinach mixture; gently stir to combine. Pour filling into prepared tart shell; spread evenly. Bake until egg is set, about 20 minutes.
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Let cool in tart pan on rack to room temperature. Garnish tart with prosciutto (if using). Drizzle with remaining oil to serve.