Intermittent fasting along with a healthy ketogenic diet
Intermittent fasting (IF) is not a diet; it is a frequency of eating and not eating. When you do not eat, you lower insulin. So the less frequently you eat, the less stress on the pancreas and the less on insulin. However, it is something you have to let your body adapt to so the secret is to do it gradually. Your body needs time to build up the cellular machinery to burn fat and switch over to ketones.
Realize that this is NOT about lowering your calorie intake; it's about eating less often. Reducing the frequency of nutrient dense meals reduces occasions for spiking insulin.