Many, many congratulations! You have lost so much weight, and are getting such good readings, that you may well have gone into remission from your diabetes already!
The critical thing is to keep the weight off. I would suggest you eat the same foods that you ate before the diet (because presumably you like those!), but in much smaller quantities. I think 2/3 of the portions you previously ate is the recommended amount following a very low cal diet such as yours, so as not to put the weight back on. Doesn't the protocol of the diet tell participants how many calories they can eat in the weight maintenance phase?
PS you may find that adding high fibre foods, makes your meals more filling.