A raw meat protein product is prepared by a process comprising directing a raw meat protein along a mixture conduit, placing steam in contact with the raw meat protein to raise the temperature of the raw meat protein to a pathogen neutralizing temperature, and maintaining that temperature in the raw meat protein for a treatment period of time. The process then includes applying a vacuum to the heated raw meat protein to vaporize water that has condensed from the steam and then separating the raw meat protein from the vaporized water and any remaining steam.