The short answer is-
balanced and limited food -just as for any healthy man.
the long answer.
normal diet for a diabetic is the diet chosen from USDA food plate or its Harvard modification, with 3 main conditions.
1)limit the total calorie intake.[ this for the healthy man too]
2) choose the the lowest amount of carbs possible=45 percent or slightly less depending upon your medicines,
from the ADA restriction of 45 to 65 carbs , [proteins limited to a maximum of 20 percent,]
if proteins are chosen 15%[ and carbs as 45-[since, in diabetic there is a defect, making the lowest of carbs ,but still within recommendations.
take proper medicines.] then it gives fats as 40 percent.[45+15=60, 100-60=40]
2a] limiting saturated fats to 7 %.
3]choose low gi foods , that is more of complex carbs and fiber.
4] just because you became diabetic ,all on a sudden , overnight,
your body requirements of nutrients do not change.
you require all vitamins, minerals, macro nutrients , electrolytes,trace elements and so on. for this fruits, vegitables, carbs ,proteins fats, water ,all are required. you are the same old individual.how can you change like that, for a few beta cells gone bad or a receptor problem?or insuling signaling error?
half learned people may advise you many things.
just ignore them.
the learned scientists of the great universities of the world have designed a balanced diet for you.
this is why elsewhere i had said the 'laws of nutrition does not change for a diabetic'.