You can have all vegetables, milk n milk products. Just avoid fast food, spicy items n cool drinks..

eat vegetable salad daily drink milk if u can drink a lot of water eating dates/papaya etc keeps you immune lastly,never be worried about your weight gain.forget about dieting until the baby stops breastfeeding.

http://www.babychakra.com/learn/525-foods-to-avoid-while-breastfeeding

http://www.babychakra.com/learn/528-a-complete-food-guide-for-breastfeeding-mothers

you can refer this chart