This is not just a list of ingredients; it is a calibrated system designed for a specific texture and a precise flavor profile, achieving professional-grade results by mastering mayonnaise choice and vegetable preparation.
The success hinges on controlling moisture: mince the onion finely (no larger than a grain of rice), squeeze out liquid until no more escapes, and thoroughly drain the relish. Use a heavy-duty, egg-yolk-rich mayonnaise where oil is listed as the first ingredient. Do not freeze the sauce, as this will cause the mayonnaise to break.
Keyword mayonnaise stability, onion moisture control, replicate restaurant flavor, tartar sauce