INGREDIENTS
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8 cups fresh blackberries (approximately 2¼ pounds)
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2 cups fresh blueberries
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¾ cup sugar
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½ cup all-purpose flour
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1⁄8 teaspoon salt
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2 tablespoons fresh lemon juice
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¼ teaspoon ground cinnamon
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¼ cup cold butter, cut into small pieces
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Buttery Pastry Dough
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1 large egg, lightly beaten
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1 teaspoon water
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1 tablespoon sugar
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Garnish: 1 teaspoon sugar
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Vanilla ice cream (optional)