If you're using a Foodsaver bag, I usually just put the frozen meat and bag right into a pot of boiling water. Bring the pot to a boil, drop the Foodsaver bag in and bring back to a boil. Boil it for about 15-20 minutes and it will be good and hot.
When you cut the bag open be careful of the steam.
Treasurer, Great Lakes BBQAssociation
Rubbed, Smoked, and Sauced Competition BBQ Team-
22 1/2" WSM, 2 18 1/2" WSM's, 22 1/2" Weber Kettle