As the other posters have said there are many beachside restaurants to choose from and they are all nice. We have spent over 4 months in total on Lembongan in the past years and have never had a bad meal. My favourites are Ketuts warung for her Thai food, great chicken and cashew and red and green curries at 20,000rp a meal, to get there go left from Lindas, past Agus's shipwreck bar nextdoor and past the dive shop, you will see a sign and you go through the abandoned bungalows and there is a small warung up the back. Also there is a mealhouse that you get too by going to the road behind Lindas turn left and about 200 meters up the road, really nice for lunches. We have never eaten at Lindas as we prefer to give the locals our business but last trip did eat at Mainski even though its managed by an Aussie and their food is nice as well