You can treat it like beef except it needs to cook much longer. If you can handle some level of spiciness & like ethnic Asian cuisine, the best way is to make an Indonesian or Malaysian style rendang or dry curry. In Asia, in the old days it was a popular way to cook tough water buffalo, 5-6 hours of slow braising to produce an amazingly tender & melt in the mouth dish. Although it's a dry curry it's still very moist & juicy and the various spices & seasonings had plenty of time to fully infuse the meat. Rendang is considered mild in terms of spiciness but the sheer richness of the taste will blow you away. It uses a lot of coconut milk but in view of your diabetes a good part of the coconut milk could be substituted with normal or evaporated milk.

With diabetes there is no need to completely deny yourself delicious food, the key is self-discipline & moderation. Even a few spoonfuls of a decadent treat once in a blue moon helps to make life more palatable, as long as you don't go berserk & eat up everything in sight :)