There are several restaurants and bars on the beach and most bungalow operators have restaurants as well. Beware that many operations in Ton Sai are not electrified throughout the day meaning that unless they are careful with food storage you'll end up with a nasty case of food poisoning. Normally there is electricity from 6:00pm-6:00am during low and mid season. During high season there is electricity for most of the businesses.
The street vendors also make fantastic authentic Thai food. Try the mango with sticky rice or Som Tum papaya salad. Cheap too!!
Mamas Chicken Kitchen highly recommended.Will do "Thai style" if you ask them.
