Heat the olive oil in a large pot over medium heat. Add the mushrooms and saute until they've released some water and start to soften, about 5 minutes. Add the onion, carrots, celery, garlic, thyme, salt, and pepper, and saute until these veggies begin to soften, about 5 minutes longer.
Add the cabbage and saute one minute. Add the tomatoes and broth and stir to combine.
Bring to a simmer, and cook until the cabbage is tender, about 30 minutes. Add more broth or water as needed (You may need about a cup). Season to taste with additional salt and pepper add a pinch of cayenne paper for a little heat and voila! I like to add a tablespoon of apple cider vinegar for my gut health
Serve hot topped with plenty of fresh parsley and extra thyme.