Tuna melts have been around forever, and for good reason — but most of them are kind of boring. Mayo, cheese, bread, done. This version keeps what makes a tuna melt great (the hot, bubbling cheese, the crispy bread) and adds a little something with toasted sesame oil, pickled ginger, and a sriracha mayo that takes about 45 seconds to make. The whole thing comes out of a toaster oven in under 25 minutes.
I started making these on nights when I needed actual food but had zero motivation to cook. Canned tuna is one of those ingredients people overlook, but with the right additions it’s genuinely good — not just acceptable. The sesame angle came from a phase where I was putting sesame oil on everything, and it stuck because it works so well here.
For this recipe you want thick bread. Thin sandwich bread doesn’t stand up to the broiler the way a good slice of sourdough does, and you lose that contrast between the crispy bottom and the molten top. A rimmed toaster oven baking pan lined with foil is all you really need. If you’re shopping for a new appliance, a toaster oven with a broil setting makes a huge difference for recipes like this — that top heat is what gives you the golden, bubbly cheese instead of just barely melted.
Make the sriracha mayo first. It takes a minute and sits happily on the counter while everything else comes together. And don’t skip the avocado at the end — it’s cool and creamy against the hot, slightly spicy cheese, and the whole thing just clicks.
Toaster Oven Crispy Sesame-Crusted Tuna Melts with Avocado and Sriracha Mayo
Toasted sesame-crusted tuna salad on thick bread, broiled until bubbly with melted provolone, then finished with sliced avocado and a drizzle of sriracha mayo. Ready in under 25 minutes and genuinely better than any diner version.
Ingredients
Tuna Salad
Sriracha Mayo
Assembly
Instructions
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Preheat your toaster oven to 400°F on the bake setting. Line the toaster oven tray with foil — makes cleanup so much easier.
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Mix the tuna salad. In a bowl, combine the drained tuna, mayonnaise, sesame oil, soy sauce, celery, and pickled ginger. Stir until it comes together, then season with black pepper. Taste it. Adjust as needed — I usually add a tiny bit more sesame oil.
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Stir together the sriracha mayo ingredients in a small bowl and set aside.
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Brush one side of each bread slice lightly with olive oil or butter. Place the slices oil-side-down on the foil-lined tray. Divide the tuna mixture evenly between the four slices, spreading it all the way to the edges so you get crispy bits on the outside. Press it down gently so it doesn't slide around.
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Sprinkle the combined sesame seeds over the tuna on each slice.
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Bake at 400°F for 9 minutes, until the bread is getting golden underneath and the tuna is hot through.
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Switch your toaster oven to the broil setting. Lay one slice of provolone over each piece. Broil for 3 to 5 minutes, watching closely — provolone goes from perfect to scorched fast. You want it fully melted with a few golden spots.
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Pull them out and let them sit for one minute. Top each melt with two or three slices of avocado, drizzle generously with the sriracha mayo, and scatter over cilantro or scallions if you're using them. Serve immediately.
Notes
Drain your tuna really well — squeeze it in a paper towel if you have to. Wet tuna makes the bread soggy from underneath no matter how hot your oven runs. Pickled ginger sounds unusual here but please don't skip it; it cuts through the richness in a way nothing else does. You can swap provolone for Swiss or even a sharp white cheddar. The sriracha mayo keeps in the fridge for a week, and honestly it's great on everything.
Nutrition
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Written by
Emma is a home cook who loves coaxing big flavor out of a toaster oven — from crispy roasted vegetables to easy weeknight dinners and sweet treats. She develops and tests Toastera's recipes for small-appliance kitchens.
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