Combine everything EXCEPT 4 tbsp water and corn starch into a gallon size freezer bag and freeze til needed. Thaw before slow cooking since meat can dangerously harbor bacteria if kept at warm temperature for too long as happens when frozen meat cooks very slowly.
When ready to cook, dump bag into slow cooker and cook on high for 3 hours.
In small bowl, whisk 4 tbsp water and corn starch together, then stir into crock pot. Continue cooking 30 minutes more.
