INGREDIENTS
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One 9-inch refrigerated prepared pie dough, or your favorite single crust recipe
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1 tablespoon all-purpose flour, plus more for dusting
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3/4 cup packed light brown sugar
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10 tablespoons unsalted butter, at room temperature
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1 large egg
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2 teaspoons vanilla extract
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1 teaspoon ground cinnamon
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1/2 teaspoon freshly grated nutmeg
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Kosher salt
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1 cup rolled oats, plus more for garnish
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3/4 cup dark and/or golden raisins
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Vanilla ice cream or unsweetened whipped cream, for serving