This simple recipe gives you a classic mignonette sauce for oysters, clams or other seafood, but you can play with the basic formula by changing the vinegar (try cider, malt, sherry, champagne), swapping the allium (try leeks, scallions or red onion), adding a squeeze of citrus juice or stirring in some fresh herbs like tarragon or mint. Let the mixture sit for at least 30 minutes before serving, so the flavors can blend and the sauce can be at its tangy, peppery best.
