Halibut with Cherry Tomato Salsa, Ratatouille, and Triple-Corn Miso Butter Corn
Moist halibut gets a bright topping of cherry tomatoes, scallions, and herbs, with basil-heavy ratatouille alongside. Sweet summer corn is browned, briefly braised in its own stock, and glossed with corn miso butter for three layers of corn flavor. This is late-July cooking built around good fish and peak-season vegetables.
By Jonathan Katzman · Cooked and photographed · Recipe updated
Serves: 4 servings
Tags: gluten-free, nut-free, pescatarian

Gentle-Roasted Halibut
A low oven keeps lean halibut moist and its surface pale, leaving the fresh salsa to provide acidity and texture.
Ingredients
- 4 pieces center-cut halibut fillet, about 6 ounces each and 1–1½ inches thick
- 1 tablespoon extra-virgin olive oil
- ¾ teaspoon kosher salt, or to taste
- ¼ teaspoon freshly ground black pepper
Instructions
- Heat the oven to 275°F. Pat the halibut dry and arrange in a lightly oiled baking dish with space between portions.
- Rub with the olive oil and season with salt and pepper.
- Roast until the thickest part reaches 145°F, checking after 18 minutes; allow roughly 20–30 minutes depending on thickness. The flesh should separate into moist flakes under gentle pressure.
- Transfer carefully to warm plates and top with the cherry tomato salsa just before serving.
Notes
- Use evenly thick portions and a probe thermometer; thin tail pieces will finish much sooner.
Cherry Tomato, Scallion, and Herb Salsa
Juicy tomatoes, fresh green alliums, and lemon balance the mild fish and the richer corn butter.
Ingredients
- 12 ounces mixed red and golden cherry tomatoes, halved or quartered
- 4 scallions, finely sliced
- ¼ cup finely diced mild green pepper, such as Anaheim, seeds removed
- ¼ cup chopped flat-leaf parsley
- 2 tablespoons extra-virgin olive oil
- 1 tablespoon fresh lemon juice, plus more to taste
- ¼ teaspoon kosher salt, plus more to taste
Instructions
- Combine the tomatoes, scallions, green pepper, parsley, olive oil, lemon juice, and salt.
- Let stand for 10 minutes, then taste. Add a little more lemon or salt if needed; the salsa should be bright but still taste primarily of ripe tomatoes.
- Spoon over the fish with a little of the collected tomato juice.
Notes
- Prepare shortly before serving so the scallions and herbs remain crisp.
Summer Ratatouille with Basil
Roasting the eggplant, zucchini, and pepper separately from the tomato base concentrates their flavor without turning the entire dish into a purée. Fresh basil lifts the rich, soft vegetables.
Ingredients
- 1 medium eggplant, about 12 ounces, cut into 1-inch pieces
- 2 medium zucchini, cut into thick half-moons
- 1 red bell pepper, cut into 1-inch pieces
- 1 yellow onion, cut into thick wedges
- 1½ pounds ripe tomatoes, cored and roughly chopped
- 3 cloves garlic, thinly sliced
- 5 tablespoons extra-virgin olive oil, divided
- 3 sprigs fresh thyme
- 1 teaspoon kosher salt, divided, plus more to taste
- ¼ teaspoon freshly ground black pepper
- 1 teaspoon red wine vinegar, plus more to taste
- 1 cup loosely packed basil leaves, torn just before serving
Instructions
- Heat the oven to 425°F. Toss the eggplant, zucchini, and bell pepper with 3 tablespoons olive oil and ½ teaspoon salt. Spread across two sheet pans so the vegetables are not crowded.
- Roast for 25–30 minutes, turning once, until tender with browned edges.
- Meanwhile, warm the remaining 2 tablespoons olive oil in a wide saucepan over medium-low heat. Add the onion and remaining ½ teaspoon salt; cook for 10–12 minutes until softened without deep browning.
- Add the garlic and stir for 1 minute. Add the tomatoes, thyme, and pepper. Simmer uncovered for 15–20 minutes, stirring occasionally, until the tomatoes collapse into a loose sauce.
- Fold the roasted vegetables into the tomato base and simmer gently for 8–10 minutes. Keep the pieces intact and leave enough sauce to pool lightly around them.
- Remove the thyme stems. Add the vinegar, adjust the salt, and fold in half the basil. Scatter the remaining basil over the dish at serving.
Notes
- If the tomatoes are watery, reduce the sauce before adding the roasted vegetables. If the mixture becomes dry, add a splash of water.
- Serve warm rather than piping hot to bring out the summer vegetables.
Quick Corn Cob Stock
Stripped corn cobs make a sweet, light stock that reinforces the corn flavor without adding cream or masking the miso.
Ingredients
- 6 fresh corn cobs, kernels cut off and reserved for the corn component
- 4 cups water
Instructions
- Cut the kernels from the corn over a rimmed tray and reserve them for the pan-roasted corn.
- Break the stripped cobs in half and place in a snug saucepan with the water. Bring to a boil, then partially cover and simmer gently for 25 minutes.
- Strain, pressing lightly on the cobs. Measure ¾ cup for the corn and reserve the rest for another use.
Notes
- Keep the stock unsalted so the corn miso can provide the main seasoning.
Pan-Roasted Corn Braised with Corn Miso Butter
Browning develops savory sweetness, a short stock braise keeps the kernels juicy, and butter emulsified with corn miso turns the reduced juices into a glossy coating.
Ingredients
- 6 ears corn, kernels reserved from the stock preparation, about 4½–5 cups
- 1½ tablespoons ghee
- 6 scallions, cut into ½-inch pieces, white and green parts separated
- 3 tablespoons unsalted butter, softened
- 1½ tablespoons Shared Cultures corn miso, confirmed gluten-free
- ¾ cup corn cob stock
- 1 teaspoon fresh lemon juice, plus more to taste
- to taste kosher salt and freshly ground black pepper
Instructions
- Mash the softened butter and corn miso together until evenly blended.
- Heat a large, heavy skillet over medium-high heat. Add half the ghee and half the corn in a broad layer. Leave undisturbed for 2–3 minutes, then toss and cook for another 2 minutes until browned in spots. Transfer to a bowl and repeat with the remaining ghee and corn.
- Return all the corn to the pan and add the scallion whites. Cook for 1 minute, then add the corn stock and half the miso butter.
- Lower the heat to medium and simmer uncovered for 3–5 minutes, stirring occasionally, until the corn is tender and only a shallow layer of liquid remains.
- Add the scallion greens and cook for 1 minute. Remove from the heat and stir in the remaining miso butter until the liquid becomes glossy and coats the kernels.
- Add the lemon juice and pepper. Taste before adding salt, since the miso may provide enough.
Notes
- If the pan dries out before the corn is tender, add stock a tablespoon at a time. If it is soupy, reduce briefly before stirring in the final butter.
- Miso strength varies; start with 1 tablespoon if yours is particularly salty, then adjust.
Overall Timing / Workflow
The ratatouille and stock can finish ahead, leaving only the fish and corn to cook near serving time.
Instructions
- 0:00 — Heat the oven to 425°F. Strip the corn kernels and start the cob stock. Chop the ratatouille vegetables.
- 0:15 — Roast the eggplant, zucchini, and pepper. Start the onion and tomato base on the stovetop.
- 0:30 — Strain the corn stock. Mix the corn miso butter and prepare the salsa ingredients, holding the dressing until closer to serving.
- 0:45 — Fold the roasted vegetables into the tomato base. Lower the oven to 275°F, opening the door briefly to release excess heat, and prepare the halibut.
- 0:50 — Put the fish in the oven. Finish the ratatouille, keeping the final basil aside, and hold it warm off the heat.
- 0:55 — Brown and braise the corn. Dress the salsa and let it stand while the fish finishes.
- 1:10–1:20 — Check the fish temperature, finish the corn butter emulsion, add the basil to the ratatouille, and plate.
Notes
- The ratatouille and corn stock can be made a day ahead. Reheat the ratatouille gently and add fresh basil at serving.
Plating
Keeping the corn and ratatouille alongside the fish preserves their distinct textures while allowing the salsa juices to season the halibut.
Instructions
- Spoon ratatouille onto one side of each warm plate and scatter generously with the reserved basil.
- Set a halibut portion beside it and spoon cherry tomato salsa over the fish, including a little of its juices.
- Mound the corn on the remaining side, keeping its miso butter glaze with the kernels rather than flooding the plate.
Leftover Path
Separate storage protects the fresh salsa and makes it possible to reheat the vegetables without overcooking the fish.
Instructions
- Refrigerate the fish, salsa, ratatouille, and corn in separate airtight containers within 2 hours of cooking.
- Use the salsa within 1 day for its best texture. Use the cooked fish within 3 days and the cooked vegetables within 4 days.
- Reheat the ratatouille gently in a saucepan. Warm the corn over low heat with a splash of corn stock or water to loosen the butter glaze.
- For hot leftover fish, cover and warm gently with a spoonful of stock until it reaches 165°F. Alternatively, serve the properly chilled fish flaked over cold ratatouille with the remaining salsa.
- Freeze surplus corn stock in small portions for soups, sauces, or another batch of corn.