Boil a whole lobster for 15-20 minutes. Drain lobster and allow to come to room temperature. Remove the shells. Slice the tail thinly into medallions Boil chicken stock. Add couscous, cover and let sit for 5 minutes. Fluff with a fork and add the finely dice onion, tarragon, parsley, cilantro and chives and add to couscous in a bowl. . Add the juice of 2 lemons to cereal mixture. Add ½ cup olive oil and salt and pepper to taste.