Balık ekmek, or fish bread, is an Istanbul street-food classic: grilled mackerel tucked into crusty bread with sharp onion, greens, and a squeeze of lemon. This home version uses a hot skillet and sumac-seasoned onions for a bright, savory sandwich that comes together quickly; vendors and households vary the bread, garnishes, and seasoning.
Ingredients
- 4 skin-on, boneless mackerel fillets, about 1½ lb (680 g) total, thawed if frozen
- ¾ teaspoon fine salt (4 g), divided
- ¼ teaspoon ground black pepper (0.5 g)
- 1 tablespoon olive oil (15 ml), plus a little extra if needed
- 1 medium red onion, thinly sliced (about 5 oz/150 g)
- 1 tablespoon sumac (6 g)
- 1 medium lemon, juiced (about 2 tablespoons/30 ml), plus wedges for serving
- 4 small crusty rolls or Turkish sandwich breads (about 11 oz/320 g total)
- 4 tender lettuce leaves (about 2 oz/60 g), rinsed and dried
- ½ cup loosely packed flat-leaf parsley leaves (about ½ oz/15 g)
Instructions
- Prepare the garnishes. Thinly slice the onion and place it in a bowl with the sumac, ¼ teaspoon of the salt, and 1 tablespoon (15 ml) of the lemon juice. Toss well, separating the slices so the seasoning reaches them evenly. Set the bowl aside while you prepare the fish. Wash and dry the lettuce, pick the parsley leaves, and cut the remaining lemon into wedges.
- Dry and season the mackerel. Pat the fillets dry on both sides with paper towels; removing surface moisture helps them brown instead of steam. Check for any pin bones and pull them out with clean tweezers. Season the flesh side with the remaining ½ teaspoon salt and the black pepper. Brush the skin lightly with olive oil. If the fillets are very large, cut each one into pieces that will fit neatly inside a roll.
- Heat the cooking surface. Set a large, heavy skillet or griddle over medium-high heat for about 2 minutes. If your pan cannot hold all four fillets without crowding, use two pans at once. Add the remaining olive oil, spreading it into a thin film. The pan should be hot enough that a corner of fish sizzles on contact, but the oil should not smoke.
- Cook the fish skin-side down. Place the fillets skin-side down and press each gently with a spatula for the first 10 seconds so the skin makes even contact. Cook for about 4 minutes, without moving them, until the skin is browned and releases fairly easily. Turn carefully and cook the flesh side for 2 to 3 minutes, depending on thickness. USDA FSIS guidance sets the safe minimum internal temperature for fish at 145°F (63°C); check the thickest part of each fillet with a food thermometer and continue cooking as needed. The flesh should turn opaque and separate easily with a fork.
- Warm the bread. Transfer the cooked fish to a clean plate. Put the rolls cut-side down in the skillet for 30 to 60 seconds, or until warm with lightly toasted edges. If the skillet has excess oil, wipe it out first. Split the rolls lengthwise, leaving one edge attached if you like a hinged sandwich.
- Build the sandwiches. Put a lettuce leaf in each roll, then add a fillet or an even portion of fish. Top with the sumac onions and parsley. Spoon a little of the lemon-onion liquid over the fish, rather than pouring it all into the bread, which can make the crumb soggy. Serve straight away with lemon wedges so everyone can add more to taste.
Tips
- Choose mackerel with an even thickness. Similar-sized fillets finish at roughly the same time. If one end is thin, tuck it under slightly while cooking, or take that piece off the heat first. Very thick fillets may need a few extra minutes, but use the thermometer rather than relying on the clock alone.
- Keep the fish dry and avoid a crowded pan. Wet fish is less likely to brown, and tightly packed fillets release steam. Pat them thoroughly dry and leave a little space around each piece. Cook in two pans if necessary; add a small amount of oil before the second batch if the pan looks dry.
- Sumac is worth seeking out, but there is a fallback. It gives the onions a tart, gently fruity flavor that is characteristic of the garnish. If you cannot find it, use a little extra lemon juice and a pinch of finely grated lemon zest. The substitute tastes fresher and more citrus-forward, rather than having sumac’s distinctive tang.
- Season in stages. Mackerel is flavorful and the onion mixture is already salted, so avoid adding a heavy layer of salt to the fish. Taste a pinch of the finished onion mixture before serving; add lemon or a small pinch of salt if it needs balancing.
Serving Suggestions
Serve balık ekmek as soon as it is assembled, while the fish is warm and the bread still has a little crunch. Put extra lemon wedges and the remaining sumac onions on the table. A simple side of sliced cucumber and tomato, dressed with lemon and a little salt, adds freshness without competing with the mackerel.
For a more substantial meal, offer the sandwiches with a bowl of lentil soup, a small serving of Turkish-style pickles, or roasted potatoes. Keep richer sides modest: the fish, sharp onion, herbs, and lemon are the point of the sandwich. For a casual spread, let diners assemble their own rolls so the bread does not sit filled and soften before everyone eats.
Variations
- Use another fish. Boneless, skin-on sea bass or trout fillets work well if mackerel is unavailable. Their flavor is milder, so be generous with lemon and sumac onion. Cooking time will depend on thickness; check the thickest area for 145°F (63°C).
- Make it with a grill. Oil a clean grill grate and cook the fish over medium-high heat, starting skin-side down. Use a thin, wide spatula to turn it once the skin has crisped and releases. Grill bread cut-side down briefly at the end. A grill basket can help keep smaller pieces from breaking or slipping through the grate.
- Add tomato or more herbs. Thin tomato slices are a common, easy addition, although ripe tomatoes can make the sandwich wetter. Use a small amount and pat the slices dry. Dill or extra parsley can supplement the lettuce; the result is greener and more herbal than the straightforward onion-and-lemon version.
- Adjust the onion’s bite. If you prefer a gentler raw-onion flavor, soak the slices in cold water for 5 minutes, then drain and dry them before tossing with sumac, salt, and lemon. This softens their sharpness but also washes away some onion flavor, so taste and adjust the seasoning afterward.
Storage and Reheating
Balık ekmek is best assembled just before eating. If you have leftovers, separate the fish from the bread and garnishes, refrigerate everything within 2 hours, and store in covered containers. Cooked fish keeps for 3 to 4 days in the refrigerator at 40°F (4°C) or below. Keep the sliced onion and lettuce separate from the fish so their moisture does not soften it.
Reheat only the amount of fish you plan to eat. Warm it in a covered skillet over low heat with a teaspoon of water, or in a microwave in short intervals, until leftovers reach 165°F (74°C). The fish may be less crisp after reheating, so avoid cooking it again in a very hot pan for a long time. Toast the bread separately and add fresh lettuce, parsley, onion, and lemon after the fish is hot. Discard any sandwich or fish left at room temperature for more than 2 hours.
Frequently Asked Questions
Is balık ekmek traditionally made with mackerel?
Mackerel is strongly associated with the Istanbul fish sandwich, and its rich flavor stands up well to lemon and onion. The fish and garnishes can vary by vendor, season, and preference, so another suitable boneless fish can work at home. This recipe uses mackerel for its bold flavor and cooks it skin-side down for a browned surface.
Can I use frozen mackerel?
Yes. Thaw it in the refrigerator overnight, or keep it sealed and thaw it in cold water, changing the water every 30 minutes. Do not thaw fish on the counter. Before seasoning, pat the thawed fillets very dry; extra moisture can prevent browning and cause oil to splatter.
How do I know when the mackerel is done?
Check the thickest part of each fillet with a food thermometer. Fish is safely cooked at 145°F (63°C), the USDA FSIS safe minimum, and the flesh should be opaque and flake easily. Thin pieces can finish sooner than thick pieces, so remove each fillet when it reaches temperature instead of assuming they all need the same cooking time.
Can I prepare the onion topping ahead?
Yes. Toss the onion with sumac, salt, and lemon up to a day ahead, cover it, and keep it refrigerated. Its flavor will become more mellow as it sits. Bring it out while the fish cooks, and use a clean spoon to serve it. Add parsley shortly before assembling for the freshest herbal flavor.
What bread should I use if I cannot find Turkish rolls?
Choose a small, crusty roll with a soft interior, such as a French-style roll or a sturdy sandwich roll. It should be firm enough to hold the fish and onion but not so hard that it overwhelms them. Avoid very airy, oversized bread, which can make the filling seem sparse; trim or portion the fish to fit the rolls you have.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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