6skinless halibut or hake fillets, about 6 ounces each (see note)
2tablespoonsrice vinegar
Instructions
In a medium bowl combine the couscous and 1/2 teaspoon salt. Pour the boiling water over the top and immediately cover with plastic wrap. Let the couscous sit until the liquid is absorbed and the couscous is tender, about 5 minutes. Uncover, fluff with a fork and season to taste with additional salt and pepper if needed. Let the couscous cool completely.
In a small bowl or liquid measuring cup, whisk together 1/3 cup room-temperature water, coconut milk, cilantro, fish sauce, ginger, garlic and pepper flakes.
Lay out six 14- by 12-inch sheets of heavy-duty aluminum foil (or use two layers of regular foil). Lightly spray the centers of each with nonstick cooking spray.
Pat the fish dry with paper towels and season with salt and pepper on both sides. Divide the cooled couscous evenly among each of the foil pieces, mounding it in the center of each piece. Place one fish fillet on top of the couscous and spoon about a tablespoon of the sauce over the top.
Bring the long sides of the foil together and crimp down the entire length (see the pictures in the post) leaving as much headroom above the fish as possible. Fold in one of the short sides and crimp tightly; repeat with the other side.
Place all of the foil packets on a large, rimmed baking sheet and refrigerate them and the remaining coconut sauce for up to 24 hours.
To serve, preheat the oven to 400 degrees F. Place the rimmed baking sheet with the foil packets in the oven and bake for 18-20 minutes, until the fish is cooked through (and registers 140 degrees on an instant-read thermometer). Let the packets rest for about 5 minutes.
Microwave the refrigerated coconut sauce for about a minute until warmed through. Stir in the rice vinegar.
Transfer the fish packets to individual plates and open carefully to avoid any escaping steam. Slide the contents onto each plate. Drizzle warm sauce over the fish and couscous and serve immediately.
Notes
Fish: the original recipe calls for halibut which is hard to find for me (and a bit too expensive when I can find it) so while it would be delicious, I found that other mild white fish (thick fillets) work great, like these hake fillets I found at Costco. Adaptable: also, I increased some components (not all) of the recipe to feed more than 4 since my family is larger than that, but you could decrease the amounts in the sauce and the number of fish fillets if you want to serve less - be adventurous, play around; this recipe is very forgivable.