Ingredients
2 cups fava beans (shelled fresh, or frozen, thawed, or peas, from about 2 pounds pods)
1 tablespoon distilled white vinegar
8 cups low sodium chicken broth
2 tablespoons unsalted butter (divided)
1/4 pound chanterelles (or crimini, baby bella mushrooms, halved or quartered if large)
2 leeks (large, whites and pale greens only, chopped)
4 garlic cloves (finely chopped)
1 bunch flat leaf spinach (trimmed, leaves torn)
2 tablespoons crème fraîche (or sour cream)
1 1/2 cups pecorino (finely grated, or Parmesan, about 3 ounces plus more for shaving)
1/4 cup chopped fresh chives (plus more for serving)
ground black pepper (Freshly)