Step 1

Position 2 racks in the upper and lower thirds of the oven and preheat to 400 degrees F.

Step 2

Combine the tomatoes, capers, 3 tablespoons of the olive oil, lemon zest and juice, shallot, basil, 1/2 teaspoon salt, and a few grinds of black pepper in a medium bowl. Set aside to let the flavors develop.

Step 3

Cut four 16-inch long sheets of parchment paper. Fold each sheet in half and open it like a book. Divide the pieces of parchment between 2 baking sheets (2 pieces per sheet).

Step 4

Toss the corn and green beans with the remaining tablespoon of olive oil, 1/2 teaspoon salt, and a few grinds of black pepper in a bowl. Divide between the 4 parchment sheets, mounding the mixture on one side of the fold. Sprinkle each cod fillet with 1/4 teaspoon salt and place on top of a vegetable mound. Dot with butter and drizzle with wine.

Step 5

Fold over the top half of the parchment, crimping and overlapping small folds along the open edge to seal tightly. Bake until the parchment puffs, about 15 minutes; the fish will be tender and cooked through. Transfer the packs to plates. Avoiding the hot steam, carefully cut open the pack. Spoon the reserved tomato-basil salsa with juices over each fillet and serve immediately.