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1
Par-cook potato and carrot separately in salted water until about half done — a knife should meet firm resistance at the center. Drain and cool completely, then chop finely.
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2
Poach gizzards and livers gently in salted water with aromatics until just cooked through. Cool, then chop roughly.
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3
Combine all ingredients in a bowl. Add butter or cream and work through the mixture until everything is evenly coated and cohesive.
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4
Season with salt, keeping in mind the brine from the capers, olives, and escabeche. Taste on a small piece of bread.
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5
Fill the cavities of two prepared whole chickens without packing tightly. Roast according to your preferred method.