Whilst Hoi An felt a bit like a Disneyfied version of Vietnam to us, there is a restaurant on the waterfront which did the best vegetarian food we ate in the whole of VN.
Cafe des Amis serves a set meal each evening (I forget how many courses). The only choice is seafood or veggie and it is utterly delicious food. If you are veggie, you'll be sick of spring rolls and stir-fried greens by the time you get to Hoi An, and Cafe des Amis will provide some very welcome and tasty variety.
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