A healthy balanced diet of upto 1800 KCal with low carb and low fat and moderate protein intake would be good to improve your
HBA1C levels. Have normal food with a bowl of rice once a day and roti/chapathi in the night and also follow 3 meal and 3 snack pattern, that is small frequent eating. A diet chart will be difficult to follow on a daily basis. Continue your exercise of at least 30 min everyday as this also improves your HBA1C and prevents weight gain.
However you HBA1C of 7.0 - 7.3 is fairly good and patients on insulin are known to gain around 3-5 Kgs of weight. Thank you!