- 1/4 cup finely chopped shallots
- 1/4 cup white wine vinegar
- 1/4 cup dry white wine
- 1/2 cup whipping cream
- 3 tablespoons vegetable oil
- 12 ounces mushrooms, chopped
- 1/2 teaspoon dried crushed red pepper
- 2 medium zucchini, trimmed, cut into matchstick-size strips
- 4 8-ounces halibut fillets (about 1 inch thick)
- 1/2 cup (1 stick) chilled butter, cut into pieces
- 2 medium tomatoes, peeled, seeded, chopped (about 1 cup)
- 2 tablespoons chopped fresh sorrel or spinach
- Combine shallots and vinegar in heavy small saucepan. Boil until most of liquid evaporates, about 4 minutes. Add wine; boil until most of liquid evaporates, about 3 minutes. Whisk in cream. Set sauce aside.
- Preheat oven to 400°F. Heat 2 tablespoons oil in heavy large skillet over medium-high heat. Add mushrooms and crushed red pepper. Cook until mushrooms are deep golden brown, stirring frequently, about 12 minutes. Add zucchini and sauté 2 minutes. Season to taste with salt and pepper.
- Meanwhile, lightly oil baking sheet. Place halibut on sheet and brush with remaining 1 tablespoon oil. Bake until fish is opaque in center, about 10 minutes.
- Bring sauce to simmer. Reduce heat; add butter and whisk just until melted. Remove from heat. Mix in tomatoes and sorrel. Season with salt and pepper.
- Spoon Garlic Mashed Potatoes onto center of 4 plates. Place halibut atop potatoes. Arrange mushroom mixture around potatoes. Spoon sauce over fish and serve.