In a bowl, combine the shrimp, apple, green onion, tarragon and mayonnaise. Season with salt and pepper.
Place a leaf of lettuce on the bottom piece of the croissants. Cover with the shrimp mixture and close the croissants.
In grocery stores and in fish markets, Nordic shrimp are sold already cooked. In season, in the spring, they can sometimes be found fresh and unpeeled. The rest of the year, they are only found frozen and thawed.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.