For gaining weight in a healthy way you need to consume in larger quantities and get bigger, but at the same time, you must also avoid unhealthy weight gain leading to fat accumulation. The first step is to intake at least 500 extra calories daily to gain weight in a week. Keep exercising and lifting weights but also ensure that you get a proper 8-hour sleep because that is the time when muscles grow faster. Start eating more fruits and veggies and have a protein rich diet. Maintain your intake of carbs and monitor your progress weekly.
