Foods that help in gain weight are extra helping of chapati, dal/ pulses and vegetable.
Milk, curds, eggs, groundnuts, almonds, cashew nuts, pistachio, dry coconut, potato and banana on regular basis helps to gain weight.
Two to three fruits a day.
If you take milk, curds, milk products, pulses, dals, eggs, nuts on daily basis than you don't need to take protein supplement.
Many people consume fried,
sugar and sweets to gain weight. That's a wrong practice.