Diabetics know they should limit carbohydrates, fats, and sugar and up their intake of fiber. The Diabetes Plate Method created by the American Diabetes Association suggests that about a quarter of each meal consist of carbohydrates, and most of those should come from whole grains, fruits, and vegetables. Additionally, New York nutritionist Laurie Simon suggests limiting any one meal to 10 grams of sugar or less, and the Centers for Disease Control and Prevention recommends about 200-225 grams of carbs a day. That's difficult enough eating at home. Sticking to the rules at restaurants is even harder — but it can be done at many popular chains.