Step 1

Assemble the packets. Preheat the oven to 400°F (200°C). Fold a 12x16-inch sheet of parchment paper in half, then open it. Add several slices of zucchini in the center of one half, then top with a piece of cod. Season with salt and pepper.

Step 2

Add toppings. Top the cod with 2 to 3 lemon slices, a few slices of shallot, a sprig of thyme, 5 olives, and 5 tomatoes (it's okay if these fall to the side). Drizzle a little olive oil on top.

Step 3

Fold and seal. Fold the top half of the parchment paper over the bottom half, then tightly roll up the edges around the cod. Repeat this process with the other 3 pieces of cod.

Step 4

Bake. Place the 4 parchment paper packets on a baking sheet, place in the oven, and bake for 14 to 18 minutes (depending on thickness), or until the cod is opaque and flakes easily with a fork.

Step 5

To serve. Use a knife to pierce the center of each parchment packet, and open it up before serving.