Baked Haddock with Spinach and Tomatoes

Ingredients

• 1 teaspoon cornstarch
• 1 tablespoon minced onion
• 1 tablespoon butter
• ¼ teaspoon dried tarragon
• ½ teaspoon dried thyme
• 1 (14.5 ounce) can diced Italian plum tomatoes, juices reserved
• 1 ½ pounds haddock fillets
• + 5 more ingredients
• • ½ teaspoon salt
  • ¼ teaspoon freshly grated nutmeg
  • 2 (10 ounce) packages chopped frozen spinach, thawed and squeezed dry
  • 1 cup thinly sliced onion
  • 1 tablespoon butter

1. Preheat oven to 375 degrees F (190 degrees C). Lightly butter a 2-quart casserole or baking dish large enough to hold haddock fillets in a single layer. 2. Melt 1 tablespoon of the butter in a skillet over medium heat and cook the onion slices, stirring occasionally, until soft, about 5 minut...

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