Calculate your TDEE and calorie intake to gain weight.
Track every single food u eat as possible.
Eat until you hit your daily macro/calorie.

IMO, there's not much of western/malaysian diet. We still eat chicken, beef, rice, oatmeal, etc...
Chicken rice or even nasi lemak can be the right choice as long as you track your calorie PROPERLY and not doing it a few days and stop a few days.
If you find hitting ur daily macro a bit difficult, try peanut butter, olive oil as I feel I can hit my calorie easily with their help.

check bodybuilding forum nutrition section. There are bunch of information you can get.