Asian Mushroom Soup...?

I went to an asian restaurant a few weeks ago, and had hibachi. Hibachi is when the cook cooks the food right in front of you. Well, before the cook came, a waitress brought us a mushroom soup which looked like just water with mushroom shavings in it. But, it was delicious. I'm wondering if anyone knows the recipe to this soup and if the recipe includes meat. (I'm a recent vegetarian. I started about a week ago.) The broth was very good, but I couldn't tell if it was mushroom broth or a meat broth. Any help?