This is PG’s take on a classic mayonnaise-based sauce, with a little heat added to the traditional version. Serve as you would for usual tartare, with fried fish and chips, or with seafood.
Put the mayonnaise in a non-reactive bowl. Add the remaining ingredients, except the lemon zest and juice, then cover and refrigerate for at least 1 hour.
Add the lemon zest and juice, and adjust the seasoning. The sauce will keep, in a sealed container, for up to 2 days in the fridge.