Preheat the oven to 180ºC and prepare a large tray or platter. Also select a large portion of aluminum foil, enough to completely wrap the fish and be able to twist them edges. Better than missing.
Wash vegetables well. Lightly peel the carrots and remove the outer or damaged part of the leek. Cut everything into sticks of about the same size and arrange in the center half of the aluminum foil (so that the other half can be folded over).
Add an optional drizzle of oil, season and add lemon juice, thyme and granulated garlic. Stir and cover with the foil, loosely, just to coat the vegetables lightly and prevent them from browning excessively. Bake 5-8 minutes.
Remove carefully from the oven. Season the cleaned sea bass fillets and place one over the vegetables, skin side down. Cut the other lemon into slices and distribute on top. Cover with the other fish and wrap with the aluminum foil.
Must make a kind of envelope, folding the edges well so that liquid does not escape from the inside, pressing the folds but gently so as not to break or crush the fish. Bake for about 10-12 minutes and open carefully.
With what to accompany the corvina to the papillote
Really the idea is that this recipe for corvina al papillote with vegetables is a full plate, but we can always enrich the menu according to our needs. As it is a round dinner, but at noon we could serve as a first course a seasonal salad, a vegetable cream or a light portion of legumes. If we want to make it more energetic, we can add to the garnish some good bread, brown rice or quinoa, for example.