Smoked Mackerel, Cucumber, and Potato Salad with Mustard Dressing
Although fresh mackerel can be hard to find, smoked mackerel is often sold in the refrigerated section of supermarkets; it is also available from mail-order sources. We used the peppered variety, but any type will do. It's delicious served alongside a potato salad with mustard dressing.
Martha Stewart Living, April 2003