Broccoli- one bunch 10 g Sugar
Cauliflower- one large head 16 g Sugar
Green Beans- One cup 3.3 g Sugar
Rutabaga- One large 34 g Sugar
Turnip- One large 7 g Sugar
You get plenty of sugar from vegetables, there’s no reason to add in potatoes or sugary fruits, you’re just slowing recovery time. Your body can adapt to the food source you consume. It can fuel itself from fats convert parts to use like sugar. The only thing you need to worry about it not going into ketosis, or keeping your carbs above 50-75 a day.
Potatoes are are 111% on the glycemic index or digested as pure sugar pretty much.