Make sure to eat lean sources of protein after a workout such as chicken, fish, lean beef, peanut butter, almonds, or beans. If you're using protein powder, make sure the kind you are using is not too high in calories and sugar.
A lot of places have healthy options nowadays. Just make sure to examine the nutritional information to make sure what you are eating is actually healthy.
Another important part about your diet is to limit the portion size of what you are eating. Many people think that one portion is much more than what it actually is. Also, eating smaller meals throughout the day is better than eating 3 larger meals.