Steaming: Place tamales in a stock pot with water and cook until warm (typically takes 1-2 hours)
Oven: Place tamales in cake pan with 1-2 inches of water and cover pan with foil paper. Check periodically to ensure water does not run out. Bake for 1-2 hours until warm.
Microwave: Place tamales on plate and cover with a wet paper towel. Cook on high until warm and ready to eat.