Langostino, lobsterette langaustine: a tail by any other name is still as sweet, even if it isn't really lobster. More closely related to hermit crabs than the noble lobster, langostinos nevertheless have the same sweet richness that you find in lobster tails at considerably lower prices. When you buy the tails frozen, more than likely you are getting langostinos that are already cooked. All you have to do is thaw them and include them in your favorite seafood recipe.
How to Thaw Langostinos
Leave the langostino tails in the bag they came in, and put the bag into a plastic or glass bowl and place the bowl in the refrigerator. Thaw the tails for 24 hours per pound, not longer than two days or you run the risk of contamination. Leaving the tails in the bag will prevent them drying out and getting gummy.
Speed thaw the langostinos by filling the bowl 2/3 full with cold water and adding the frozen tails. Leave them on the counter for up to two hours. Change the water every 15 minutes or so to halt the growth of bacteria.
Remove the langostino tails from the bag and gently blot them dry with a paper towel or a lint-free kitchen towel. Put them in the bowl and cover it with plastic wrap. Leave it in the refrigerator until you are ready to use the langostino tails.
Choose your recipe. Use langostinos in any recipe that calls for shellfish.
Put the thawed tails between two paper towels and wring lightly with your hands to remove any excess liquid that could affect the outcome of your dish.
Prepare the dish. Langostinos can be tossed in a salad, included in a bisque or soup or tucked into a po' boy sandwich. One of the classic ways to prepare them is to sauté them in butter with garlic and white wine, and pair them with the pasta of your choice.