Correct me please For gaining weight I know have several methods. but if you consider about eating I can give you some solutions. Try to eat meat(mutton,cow,hen,turkey... and every kind of meat with high protein and low amount of fat), egg specially egg white ( because the yolk have high amount of Cholesterol and not healthy to eat regularly) a lot because they contained enormous amount of protein. Also eat boiled potatoes ( don't try fried ones) and bread. they have high rate of Carbohydrates and help you gain weight. but don't forget that just by eating food ,you not going to be in great shape. you need to exercise regularly, specially the physical movement that makes you consume energy and make you hungry.