my kid is very lean, how to increase his weight,could you please suggest the diet

A. Namaste Father , Been lean is not harmful or unhealthy as far as the child is active for his age and also eating healthy as well. so make sure foods such as dry fruits , panner , tofu, dals , legumes such as chana , rajma , etc ghee , milk , rice , roti , millets , fresh fruit milk shake are included