When looking to restore insulin sensitivity, you should start incorporating basic nutrient timing principles.
Using basic principles – You would want to consume your starchy carbohydrates post workout. This will allow you to reap the benefits of insulin and partition the carbohydrates into your muscles vs. your fat cells.
Focus the rest of your meals around protein, healthy fats and non-starchy vegetables. Making sure these meals are rich in micronutrients will also help your body burn calories more efficiently, regulate appetite, lower inflammation, aid digestion, and allow your cells to be in an optimal environment to become more insulin sensitive.