If you have a nice sharp chef's knife, this is a breeze. (Or if you don't, you should buy a sharpening stone, and you'll never have blunt knives again.) The idea for this recipe came about when we were catering a HUGE job on a TINY budget. They wanted tuna tartare, but I knew it would be expensive, and it's best eaten soon after it's made or it starts to get all gummy. Gravlax, on the other hand, needs at least a couple of days to cure, so I decided to use diced salmon instead of tuna, for economy, and to marinate it with our gravlax spice mix a day before the event, freeing up the chefs for other last-minute things. In my test run, I added orange zest, thinking, isn't orange good with salmon?
Normally you would put something like this on a cucumber slice and that would be fine, but the juniper in the marinade suggested potato, so we served it on a slice of crisp potato, and it was ravishing in the extreme. The potatoes can be made ahead of time too, as long as they're cooked until they're completely crisp and stored in an airtight container until you need them. Any potato not cooked all the way through will soften the others; if that happens, pop them all in a 350°F oven for five minutes, or until they've crisped up again.
The salmon can be sticky, so use two teaspoons to put it on the potato. I could never remember of which there was more in the gravlax cure, sugar or salt (since in the basic gravlax recipe one is three tablespoons and one is four). So after years of irritably looking up such a short recipe, I decided to THINK for a second and realized salt has four letters so salt is the four tablespoons. Welcome to my world.
