At the medieval reenactment, I got to sample a special kind of soup. It is a centuries-old Russian recipe that is a vegetable recipe with cabbage and kale. I even had the option to include some stewed pork. The pork was tender, the cabbage was mildly crunchy, and the broth was filling and rich. In addition, I tried bread from the period and it had a somewhat subtle vegan taste despite being bread. There will be scenes in my fantasy book that take place in a tavern or inn and I think this soup and bread would be something the characters could order.