Crock Pot Japanese Onion Soup: Ingredients: 2 Carrots, 2 Celery Stalks, 2 Garlic Cloves (smashed), 6 Cups Chicken Broth, 1 Onion, 8 Oz. Mushrooms (sliced), 4 Green Onions (sliced). Cook all but green onions & mushrooms for low 4-5 hours. Use slotted spoon to remove veggies and set aside. Add green onions & mushrooms and slow cook for additional hour until shrooms are tender.