Arrange the cod on a baking sheet lined with foil or parchment paper.
Scatter the vegetables around the cod and set aside.
In a small bowl, whisk together the butter, italian seasoning lemon zest, lemon juice, salt and pepper. Pour the lemon butter sauce over the fish and vegetables.
Toss the vegetables lightly to coat.
Sprinkle the parmesan cheese over the fish.
Transfer the baking sheet to the oven and bake for 15-20 minutes or until the fish is no longer translucent and flakes easily with a fork.
Remove the cod from the oven and serve with the veggies alongside lemon wedges, if desired.
Video
Notes
Make sure your cod filets are the same size and thickness so they cook evenly.
Same for the vegetables, they need to be cut into uniform sizes so they all cook at the same rate.
Cod filets can be substituted with salmon filets, halibut or mahi mahi.