Wanted to prove to the wife that not everything on the Egg had to come from a pig, a cow, be wrapped in bacon, or have a smoke ring, and that I could cook something healthy. Halibut filets cooked in parchment (en Papillote as Julia would say). Turned out very moist, tender and flaky. Did them indirect at 400 for 20 minutes. In order to not be too healthy and ruin my reputation, threw on a batch of oatmeal raisin and chocolate chip cookies after the fish.
It's not a science, it's an art. And it's flawed.