Start by cutting of parchment paper into a large heart shape. Lay flat on counter.
On one side of the "heart", layer vegetables and season lightly with salt and pepper. Top with fish filet and cover the fish a heaping tablespoon of pesto.
Fold the empty side of paper over the fish and vegetable medley to enclose the food. Starting at one end , make very tight overlapping folds. When you reach the end, twist the paper closed to prevent leaking.
Place packet on a baking sheet and transfer to oven. Bake for 14-15 minutes and remove. Allow packet to sit 1-2 minutes and then carefully cut open.