Thumbnail-size caperberries are what remain after the petals of the flowers of the caper bush have dropped off; capers themselves are the brined or pickled flower buds.
Combine all of the ingredients in a small bowl and let stand until the flavors develop, at least 20 minutes.
Make Ahead: The gremolata can be kept refrigerated in a covered bowl for up to 5 days.
Serve With: Grilled, sautéed or roasted tuna steaks, halibut steaks or fillets, pork loin or shrimp; pan-roasted chicken breasts (stuff about 1 tablespoon under the skin of each of 4 chicken breasts)
Notes: Caperberries are available at specialty food stores.
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