In a large pot, cook the onion in 2 tablespoons of the broth over medium-high heat for about 4 minutes, stirring occasionally, until the onion begins to soften.
Add the garlic and sauté for 1 minute, or until fragrant.
Add the remaining broth and the next 9 ingredients (mushrooms through bay leaves), bring to a boil, reduce the heat, and simmer uncovered for about 10 to 15 minutes or until the mushrooms and vegetables have softened.
Stir in the vinegar, stevia, and any additional herbs, salt, and pepper, to taste. Remove the bay leaves and serve with your favorite protein or a side of edamame (vegans only).