Making a parchment envelope in which to steam a fillet of fish surrounded by aromatic vegetables may sound a bit fancy for just one, but cooking in parchment is actually one of the simplest and most effective ways of steaming, because it seals in the flavors. What a treat it is to have that golden-tinged, puffed-up half-moon of parchment on your plate, and then to tear it open and breathe in all the heady aromas. Moreover, you’ll have no cleanup afterward; just wipe off the Silpat mat and throw away the parchment after you’ve scraped and scooped up every last delicious morsel and its jus. If you want just one meal out of this, get about a 6-ounce fillet of flounder, halibut, salmon, red snapper—whatever looks good. Or, as I did recently, try tilapia, which is quite readily available these days and at a reasonable price. But bought almost twice the amount I needed, so I could play with the other half of the cooked fillet a couple of days later. I learned from Katy Sparks, whose book, Sparks in the Kitchen, is full of great cooking tips from a chef to the home cook, the trick of pre-roasting several slices of new potato so they can go in the parchment package. This way you have a complete, balanced meal-in-one cooked all together.
If you deliberately cooked more fish than you need, remove what you won’t want the first time around, and save it for a second round.