2. In a small bowl combine the butter and Curry. Transfer to a piece of plastic wrap, twist tightly to create a log shape. Freeze. Once frozen slice into 8 portions. Freeze until ready to use.
3. In the middle of each piece of parchment paper, add 1/4 cup couscous, 1/4 cup coconut milk and 1 portion of fish. Season fish with salt and pepper. Then evenly distribute the garlic, zucchini, tomatoes, raisins, cilantro, olive oil, and 2 portions of the frozen Curry butter among the 4 packets.
4. Bring the long edges of the parchment together and fold down until just taut. Then tuck under the short edges under the fish. Place in a rimmed baking sheet.