Yes, you can freeze this dish. I recommend using large freezer bags to freeze beef bourguignon. Fill a gallon-sized ziptop bag about 3/4 full of the fully cooled stew, leaving enough space for it to expand once frozen. Freeze flat for up to 3 months. Thaw in the refrigerator overnight and reheat in a heavy bottom skillet or dutch oven on the stovetop over low-medium heat until warmed through.