Set your oven to 210°C, grill/broiler on and rack set to the upper most position.
Start by mixing/whisking in a small bowl the oil, lemon juice and oregano.
In another bowl add the julienned veggies and season them with half the salt and pepper
Place individually the fish fillets on parchment paper, skin side down, and brush each side with the above oil mixture. Season each side with remaining salt and pepper and place on top of each fillet ¼ of the julienned veggies. Add some butter, pour 1 ½ tbsp of wine and fold/twist the parchment paper to create some sort of a paper bag, making sure that they are tightly closed. Add each paper bag on an aluminium foil sheet and fold again to seal well.
Place the 4 paper bags on a baking sheet and place in the oven to be cooked for 30’. Remove from the oven, get rid of the aluminium foil sheets and serve each paper bag on a plate.