Heat a pot over medium heat, add mushrooms, and let them cook without stirring for 2 minutes.
Stir, add onions, and cook until softened.
Add garlic and sauté until fragrant.
Deglaze the pot with white wine vinegar.
Stir in lentils, thyme, rosemary, and soy sauce.
Pour in broth, add bay leaves, and simmer for 20 minutes, covered.
Stir in tahini, cover, and cook for 5-10 more minutes.
Remove bay leaves. Mix miso paste with a bit of broth, then add back to the pot.
Stir in spinach and parsley, let them wilt, and serve hot.
