A type of shellfish, langostinos resemble small lobsters. Although they are often sold as prawns or under the name "squat lobster," langostinos belong to the crab family. The tail meat is the only edible portion of the crustacean; it has a texture similar to shrimp but with a mildly sweet flavor resembling crab or lobster meat, says SeafoodSource.com. Langostino tails are most often sold precooked and frozen. Fresh langostinos can be sauteed or fried in the same way as prawns; however, a low-fat preparation method such as poaching is healthier and yields meat that can be used in a variety of dishes.
Fill a large saucepan or stockpot with liquid, choosing from water, broth, wine or a combination. Plan on approximately 2 cups of liquid for 18 to 24 langostinos.
Stir your choice of seasonings into the liquid. These can include salt, pepper, spices, freshly minced herbs such as parsley, flavored vinegar and chopped onions, celery and carrots.
Bring the liquid to a boil over high heat. Reduce the heat until the mixture simmers, leave the pot uncovered and cook for up to 30 minutes. Strain the liquid through a colander or strainer and return only the liquid to the pot.
Bring the liquid back to a simmer. Add the langostinos and poach for three to four minutes.
Remove the langostinos from the poaching liquid and serve immediately or chill and use the meat in other recipes.