Black Cod with Mushroom Sauce, Balsamic Brussels Sprouts, and Miso Butternut Mash

Gently Roasted Black Cod

Moderate oven heat preserves black cod’s rich, delicate flakes and leaves a mild surface for the mushroom sauce.

Ingredients

• 4 pieces black cod fillet, 5–6 ounces each, pin bones removed
• 2 teaspoons olive oil
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon freshly ground black pepper

Instructions

1. Heat the oven to 325°F. Line a small rimmed baking sheet with parchment.
2. Pat the fish dry, check carefully for pin bones, and arrange skin-side down if skin is attached. Rub with olive oil and season with salt and pepper.
3. Roast for 12–20 minutes, depending on thickness, until the thickest part reaches 145°F and the flesh separates into moist flakes under gentle pressure.
4. Transfer carefully with a wide spatula and spoon the warm mushroom sauce over the fish just before serving.

Notes

• Black cod is also sold as sablefish. Begin checking thin portions early; its delicate flesh can break during transfer.

Mushroom-Shallot Sauce

Browning mushrooms before adding liquid builds a savory foundation. Reduced wine and a small butter finish create a glossy sauce without obscuring the fish.

Ingredients

• 12 ounces cremini mushrooms, sliced 1/4 inch thick
• 1 tablespoon ghee
• 2 medium shallots, thinly sliced
• 1 clove garlic, finely chopped
• 1/3 cup dry white wine
• 3/4 cup low-sodium gluten-free vegetable stock
• 2 tablespoons cold unsalted butter, cubed
• 1 teaspoon lemon juice, plus more to taste
• 3 tablespoons roughly chopped flat-leaf parsley, divided
• to taste fine sea salt and freshly ground black pepper

Instructions

1. Heat the ghee in a wide skillet over medium-high heat. Add the mushrooms in a broad layer and cook, stirring only occasionally, until their moisture evaporates and their edges brown, 7–9 minutes.
2. Lower the heat to medium. Add the shallots and a pinch of salt; cook for 3–4 minutes until softened. Stir in the garlic for 30 seconds.
3. Add the wine, scraping up the browned bits, and simmer until reduced by about two-thirds.
4. Add the stock and simmer for 4–6 minutes, until the liquid is concentrated but still loose enough to pool around the fish.
5. Lower the heat to very low and swirl in the cold butter a few cubes at a time. Stir in the lemon juice and 2 tablespoons parsley. Taste and adjust salt, pepper, and acidity.
6. Spoon over the fish and finish with the remaining parsley.

Notes

• If the sauce becomes too thick or salty, loosen it with a splash of water. After adding the butter, keep it warm without boiling.

Roasted Brussels Sprouts with Balsamic

High heat browns the cut faces and crisps the loose leaves. Balsamic added near the end gives a tart glaze without burning.

Ingredients

• 1 1/2 pounds Brussels sprouts, trimmed and halved, large ones quartered
• 2 tablespoons olive oil
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon freshly ground black pepper
• 1 1/2 tablespoons balsamic vinegar

Instructions

1. Heat the oven to 425°F. Dry the sprouts well and toss with the olive oil, salt, and pepper.
2. Spread on a large rimmed baking sheet, mostly cut-side down, leaving room between the pieces.
3. Roast for 20–25 minutes, until the cut faces are deeply browned and the centers are tender with a little resistance.
4. Toss with the balsamic and roast for another 3–5 minutes, until lightly glazed. Taste and adjust the salt.

Notes

• Use regular balsamic vinegar rather than a sweetened bottled glaze. Remove any loose leaves early if they brown before the larger pieces.

Miso Butternut Squash Mash

Roasting concentrates the squash’s sweetness without making the mash watery. Miso adds fermented depth, while butter rounds out its texture.

Ingredients

• 1 large butternut squash, about 3 pounds
• 2 teaspoons olive oil
• 2 tablespoons unsalted butter
• 1 1/2 tablespoons mild gluten-free Shared Cultures miso, plus more to taste
• 2–4 tablespoons hot water, as needed
• to taste fine sea salt

Instructions

1. Heat the oven to 425°F. Halve the squash lengthwise and scoop out the seeds. Rub the cut sides with olive oil and place cut-side down on a parchment-lined baking sheet.
2. Roast for 45–60 minutes, until a knife slides through the thickest part with no resistance.
3. Scoop the hot flesh into a bowl or food processor. Add the butter and miso, then mash thoroughly or process until smooth.
4. Add hot water a tablespoon at a time only if needed for a soft, spoonable consistency. Taste before adding salt or additional miso.
5. Keep covered and warm over a very low heat, stirring occasionally.

Notes

• Choose a mellow miso whose label confirms it is gluten-free. Start with less if the miso is especially salty or assertive.

Overall Timing / Workflow

The squash tolerates holding, while the sprouts and fish benefit from being cooked closer to serving. Make the sauce through its reduction stage before finishing it with butter.

Instructions

1. 0:00 — Heat the oven to 425°F, prepare the squash, and put it in to roast.
2. 0:10 — Trim the Brussels sprouts, slice the mushrooms and shallots, and check the fish for pin bones.
3. 0:30 — Put the sprouts in the oven on a separate rack. Rotate the trays if needed for even browning.
4. 0:40 — Begin the mushroom sauce. Reduce the wine and stock, then turn off the heat before adding the butter.
5. 0:55–1:05 — Remove the tender squash and finished sprouts. Mash the squash with butter and miso and keep covered. Leave the sprouts uncovered to preserve their edges.
6. Lower the oven to 325°F, briefly opening the door to release excess heat. Put the fish in once the temperature has fallen.
7. While the fish roasts, gently reheat the mushroom sauce, finish with butter, lemon, and parsley, and warm the plates. If needed, rewarm the sprouts in the oven during the final 5 minutes.
8. Serve as soon as the fish reaches its target temperature.

Notes

• Allow extra time for a particularly large squash; tenderness, not the clock, determines when it is ready.

Plating

Separate areas preserve the contrast between smooth squash, crisp-edged sprouts, and tender fish, while the sauce connects the plate.

Instructions

1. Spoon a generous swoosh of butternut mash along one side of each warm plate.
2. Arrange the Brussels sprouts beside it, keeping their browned faces visible.
3. Place the black cod in the remaining space and spoon mushrooms over the top, allowing a little sauce to pool around the fish.
4. Scatter the reserved parsley over the mushroom sauce and serve immediately.

Leftover Path

Separate storage lets you reheat the fish gently and restore some crispness to the sprouts without drying out the mash.

Instructions

1. Refrigerate the fish, sauce, mash, and sprouts in separate shallow airtight containers within 2 hours. Use within 3 days.
2. Reheat the mash in a small saucepan over low heat with a splash of water, stirring until hot.
3. Reheat the sprouts in a 400°F oven for 8–12 minutes.
4. Warm the fish and mushroom sauce together in a covered skillet over low heat with a splash of water until the fish reaches 165°F; avoid a hard simmer.
5. Alternatively, flake the cold leftover fish over a simple green salad and serve the reheated vegetables alongside.