Bangkok is littered with malls and there is a good chance you will pay a visit to at least one during a stay in the city. If you do, our advice would be to eat at the malls food court. With hundreds of Thai dishes at tiny prices Bangkok food courts offer a great introduction to basic Thai food and the staples of local cuisine.
Bangkok food courts are commonly operated by a coupon system. Pay for coupons at the coupon desk, use coupons to buy food at the stalls, return coupons as you leave for cash balance refund. Simple, delicious and inexpensive.