Preheat the oven to 400 degrees and lay out the sheets of parchment paper on a flat surface.
Evenly divide the green beans, shallot, and red bell pepper among the 2 pieces of parchment paper, placing the ingredients in the center of the parchment. Place the halibut on top.
In a small bowl, whisk together the miso, coconut aminos, fish sauce, sriracha and honey. Evenly pour over the tops of the halibut.
Sprinkle the top of the fish with salt and the white pepper.
Fold down the short ends of the parchment paper over the fish, making a rectangle. Then, grab the open ends and roll towards the fish so that no liquids can escape and creating an enclosed package.
Place the parcels on a sheet pan and transfer to the oven. Bake until the fish is cooked through and flakes easily, about 13-15 minutes.