INGREDIENTS
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2 cups half-and-half
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1/4 cup limoncello
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3 tablespoons granulated sugar
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1/2 teaspoon vanilla extract
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1/2 teaspoon finely grated lemon zest
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1/8 teaspoon kosher salt
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3 large eggs
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Unsalted butter, for buttering the casserole dish
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5 cups cubed challah (about 8 ounces)
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1/3 cup confectioners' sugar
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1 tablespoon limoncello
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1 teaspoon finely grated lemon zest