Yes Judith it is, the biggest part of the bulgarian cuisine works without meat.
Are you vegetraian or veganian??
If you find and bulgarian style restaurant in Pamporovo you will be in heaven, ask Pete for information.
If not you will find in the most restaurants a dish called Sireni po schopski, is the typical white cheese in an earthern pot with tomatoes, peppers covered by an egg. Or you can try the salads or the mese....