As a one-upon-a-time vegetarian (who now enjoys the occasional burger), I know how difficult it can be to find plant-based options in unfamiliar places. Have no fear; this fun infographic by Travel Supermarket is here to ease the plight of mindful foodies everywhere. It pulls together data on factors like vegan food stores, plant-based kitchens, and seasonal farmers markets to nail down 10 of the best cities for vegetarians. From NYC to Ho Chi Minh…