INGREDIENTS
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2/3 cup sugar
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1/2 cup fresh lemon juice
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1/4 cup fresh orange juice
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1/8 teaspoon salt
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6 large egg yolks
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3 tablespoons butter, cut into small pieces
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2 teaspoons grated lemon rind
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1 1/2 cups blueberries
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1 1/2 cups raspberries
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8 teaspoons graham cracker crumbs