Skate with Wild Mushrooms in Pearl Sauce

Ingredients

• For mushroom sauce:
• 1 small leek (white and pale green parts only), chopped
• 1 tablespoon olive oil
• 1 medium carrot, chopped
• 1/2 medium onion, chopped
• 1 garlic clove
• 1/4 cup dry white wine
• 2 cups water
• 1 teaspoon soy sauce
• 1 fresh flat-leaf parsley sprig
• 1 fresh thyme sprig
• 1 Turkish or 1/2 California bay leaf
• 1 tablespoon crumbled dried porcini*
• 1 tablespoon quick-cooking tapioca
• For sautéed mushrooms
• 1/2 tablespoon unsalted butter
• 1/2 tablespoon olive oil
• 6 oz mixed fresh mushrooms, such as oyster and chanterelle, trimmed and halved lengthwise or quartered if large
• 1/4 teaspoon salt
• 1/8 teaspoon black pepper
• 1 celery rib, thinly sliced diagonally
• For skate
• 1 1/2 tablespoons all-purpose flour
• 1/4 teaspoon curry powder
• 2 (5- to 6-oz) pieces skate fillet, halved crosswise if large
• 1/2 teaspoon salt
• 1/8 teaspoon black pepper
• 1 1/2 tablespoons unsalted butter