I am braising lamb shanks, but I want to do it the day before the dinner, so that I can put the lamb and the sauce into the refer so the fat will congeal. The next day I can remove it and then that night contine with the dinner. Should I cook the lamb for the required 90 minutes and then just heat gently prior to the dinner or should I remove the shanks after 60 minutes and finsh with the cooking the next day? For some reason, 90 minutes does not seem long enough to achieve meat falling off the bone.