Matira Snack is a nice low key local place for cheap lunch, open 10h-17h. But they close for the holidays as from this Saturday. 10 min stroll along Matira Beach, direction Vaitape.
Lucky house is 2 min outside the hotel, on the right (away from Vaitape). Again, a casual place, nice for lunch and diner.
Continue in the same direction for less than a minute, and you will find a shop on your left which has everything you might desire. They have tench bread, etc.