Protein matters: Include a protein in every meal and use them as snacks to. Good quality proteins sources are meat and eggs, vegetarians can have milk (whole fat), yogurt, paneer, soy, soy milk and tofu.
Break your meals: Eat 5- 6 meals in the day which include three major meals and 3 snacks. Start with a quantity you can digest and slowly build up to the target amount.
Say yes to nuts:Nuts and seeds are great sources of healthy fats, fibre and proteins. Small amounts add a lot. 30gms of nuts provide approximately 150- 200 Kcal. Use them as snacks or add them to drinks or salads. Nut butters like peanut butter are also a healthy way to increase your meal's calorific value. Dried fruits like dates, figs and raisins as well as manakka are good calorie sources and in addition contain iron to.
Other tips: Include high calorie fruits in your diet like ripe mangoes and bananas. Avoid too much liquid at meal times. Have adequate fluids in between meals. Apart from this, don't forget to exercise regularly. It is very important for your body to stay active and aid in maintaining active metabolism.
Always remember, weight gain does not happen overnight, be patient. You may need to tweak your diet plan now and again. Work with your nutritionist to personalize a plan.