You can reheat this bisque on the stove or microwave. If it's frozen, defrost slowly in the fridge overnight before reheating. Place the defrosted bisque in a saucepan over low to medium heat. Bring it to a slight simmer and stir regularly until the bisque is warmed all the way through. If using a microwave do so in short intervals; microwave on high for about 20-30 seconds, then stir and go another 20 seconds or so until warmed all the way through. Regardless of how you reheat the bisque, take your time and reheat it slowly. If you are too aggressive with the heat, the shrimp will have a tendency to cook further and get hard and rubbery.