For me, I use the microwave's power setting. This is sometimes a misunderstood feature. When you don't set the power level, then it is 100%. This means during 100% of the cook time the magnetron inside the microwave is active and radiating your food. If you set the power level to 10, then during the cook time, the magnetron will not be active the entire cook time, instead it will be active during 10% of the time. "Power" is a bad term because it does not effect the power level of the magnetron. It affects the amount of time it is active.
This is helpful to know if you also understand that microwave energy does not penetrate very deeply into your food. It enters about 1 to 2 inches. This mean the surface of your food gets really hot when the magnetron is on, but the deeper parts are not getting hot. You use this to your advantage by setting a lower power level which allows the heat to conduct through your food naturally when the magnetron is not active. It is a way to warm the entire product without blasting the outside of it.
If you are microwaving something thick, then reduce the power and increase the time.
If you have a microwave safe shelf, then use it! That allows more microwave energy to come in conduct with more of your food's surface. The waves "bounce" inside the box, so being on a shelf lets some wave bounce under it and hit the bottom of your food.
Because it is made from pastry dough. Pastry dough (and any other kind of dough) gets ruined by a microwave. See this question for details of what will probably happen.
The only exceptions for dough in the microwave is pasta (which is supposed to be boiled in water anyway) and some kinds of very soft batter, which can be eaten immediately as a "microwave cupcake" (I think they get unappetizing if left to stay for a while). Any other kind of dough is destroyed by the water escaping the starch as steam.
Best Answer
My best method for reheating frozen prawns is to cover them with hot liquid. Broth is good, but water works. I even just use hot tap water. In a few minutes they are ready to eat. Even if I am adding them to a dish, I thaw them in warm water and add after I have taken the pot off the flame. Frozen shrimp just get rubbery too easily.