With the rack in the middle position, preheat the broiler. Turn off the broiler and preheat the oven to 250 °C (500 °F).
Divide the artichokes among 4 rectangles of two layers of parchment paper. Place the fish steaks on the artichokes. Season with salt and pepper. Sprinkle with the olives and lemon zest. Drizzle with oil. Close to seal the papillotes.
Place the papillotes on a baking sheet. Add the tomato clusters on the side. Brush the tomatoes with oil. Season with salt and pepper. Bake for about 13 minutes.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.