carrots, green/red/yellow sweet (bell) peppers, sweet potatoes, and beets are all fantastic choices. Every one of those has a glycemic load of either 1 or 2, which is stupidly low. The GL means the glycemic index is low and it has very few calories. You could mix and match to get variety and avoid boredom. Just note that you are likely to eat a great amount (weight) of beets and sweet potatoes since they are heavier so you would want to watch those portions with your ounce/gram food scale. Once for ounce though they are all almost identical in macros and GL's.