Inthira
The largest and most popular restaurant in mae sariang. large variety, great portions and superb food. the owners are lovely. ti, the main cook, makes a great red curry. the tom-yum goong prawn soup is also particularly good. very laid back atmosphere, fast service, and can accommodate large groups! highly recommended!!!
Sawadee
Overlooks the river is excellent and they stock beer laos for only 80b a bottle 33 cl. the owner has excellent english and she cooks a good, if slightly small american breakfast. if you like, or want to try, isaan style som tam, sawadee is the place to try it. ask for it 'pet nid-noi' if you are afraid of it being too spicy.
North West Guest House
Has great food, made by the lovely owner tuk-ta. all of their food is delicious - expecially good if you want to try some thai specialties such as pad pong curry, satay chicken, and salawin fish cake. if there is something you would like - they will make it. and she love to teaching you to cook her thai food also!
River House hotel
Pretty much every hotel has a restaurant. The best of these is probably the River House hotel. They do a truly excellent steak for 180b, and the open-air restaurant there overlooks the river.