I would suggest that you already are normal, and that your initial diagnosis was a result of your body reacting to an abnormal input for it.
It looks like once the body has been hit with diabetes, a threshold amount of carbs / sugars from maybe sources that could be handled years ago no longer is the case, like a muscle memory of diabetes.
You can try by eating to your meter foods that you prefer, to see if your body will accept. It will be trial and error to see if you can handle the usual fast to hand / availability foods. For example I tolerate carrots and butternut squash, in "normal" (large for me) portion sizes, whilst I know some Type 2's can't. I set my acceptance as 1.5 mmol raise or lower, whilst many agree 2 is a good marker. At seasonal times, many well controlled accept the rises that higher carb foods cause and then get back on the wagon.