"Rhubarb and strawberries go hand in hand, and what better way to honor the combination than in this classic summer pie. The lattice top looks fancy but the technique is super-easy to master...."
INGREDIENTS
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1 1/4 cups whole-wheat pastry flour , (see Note)
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1 1/4 cups all-purpose flour
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2 tablespoons sugar, plus 1 teaspoon for sprinkling (optional)
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1/2 teaspoon salt
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4 tablespoons cold unsalted butter
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1/4 cup reduced-fat sour cream
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3 tablespoons canola oil
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4 tablespoons ice water
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1 large egg white, beaten, for brushing
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2 1/2 tablespoons instant tapioca
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4 cups sliced fresh or frozen (not thawed) strawberries , (about 1 1/4 pounds)
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1 cup sliced fresh or frozen (not thawed) rhubarb
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2/3 cup sugar
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1 tablespoon lemon juice
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Pinch of ground nutmeg
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Pinch of salt