INGREDIENTS
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2 tbsp. unsalted butter
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1 lb. assorted wild mushrooms (such as shiitake, oyster, and cremini)
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9 stalk celery
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2 medium onions
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salt
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Freshly ground pepper
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1 loaf sourdough bread
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1 1/2 c. low-sodium chicken broth
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1/2 c. Chopped flat-leaf parsley
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1 tbsp. chopped fresh thyme
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1 tbsp. chopped fresh sage
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1 tsp. chopped fresh rosemary