Heat the oven to 450°.
Melt the butter in a skillet over medium heat. When the foam subsides, add the scallions and garlic and cook until fragrant. Add the mushrooms and savory and cook, stirring or shaking the pan, until the mushrooms have rendered a lot of liquid. Turn the heat to high and cook until the liquid is nearly evaporated. Season the mushrooms to taste and set aside to cool.
Spread 1/2 cup of the rice on one side of a sheet of parchment. Lay a portion of fish over the rice and top with a quarter of the mushrooms. Repeat with the remaining portions. Seal the packages and bake on a sheet pan until puffy and browned, about 8 min. Serve in the papers or carefully transfer the contents to a dinner plate.
nutrition information (per serving):
Photo: Ellen Silverman