defrosting trick

I'm making a dish that contains meatballs tonight. I forgot to get the ground turkey out of the freezer this morning. I don't like doing it in the microwave because it ends up cooking part of it and leaving part still frozen. But, it's a hot day. So, I put the frozen brick of meat on a plate, and put the plate in the back of the car. 2 hours later it is soft and perfect!