I was pleasantly surprised to find this site Happy Cow which provides listings around the world of vegetarian restaurants and other vegetarian sources by country, as their website says:
HappyCow’s vegetarian restaurants guide is a global, searchable vegetarian dining guide and directory of natural health food stores, including nutrition & health tips, vegan recipes, raw foods, travel, vegan-ism and other vegetarian issues.
And of course, they include a listing for vegetarian restaurants in Puerto Rico. What I respect about this listing, is they mention which restaurants are not 100% vegetarian, so any vegetarian living here or visiting from abroad is fully informed before they visit the establishment. Something I liked, is that on the top of the page you can select if you want the whole listing, or just 100% vegetarian and vegan restaurants only. Yeah!!! they get it.
I believe it’s best to cook yourself, where you are 200% sure of what’s going into your food. But I am realistic that cooking for yourself all the time is very difficult.
Just thought it is fair to give you good options and alternatives, not just criticize what’s available.