Potato braise is a classic home-style side dish—comfort food you probably grew up eating. The sweet-and-salty glaze soaks into the potatoes, making them a perfect match for rice, which is why so many people love it. Most recipes rely on a soy sauce–based seasoning, but adding just one more ingredient completely transforms the dish: canned tuna.
The tuna’s umami and oil seep into the potatoes, giving the dish a deeper, richer flavor. Mix in a gochujang-based seasoning and you’ll have a tuna potato braise that’s utterly addictive with rice. The method is simple, so this is an easy, show-stopping side to make at home.
Prep makes all the difference
Start by peeling the potatoes and cutting them into bite-sized pieces. Shoot for about 1 cm (roughly 0.4 in) cubes. If they’re too big, cooking takes longer and the seasoning won’t penetrate as well. Cut them too small, and they’ll fall apart while cooking.
Cut to the right size so the potatoes become tender but keep their shape. Soak the cut potatoes briefly in water to remove excess starch—this helps prevent them from sticking together during braising.
Frying in the tuna oil is the trick
The key step is using the oil from the canned tuna first. Open the can and pour the tuna oil into the frying pan. That oil brings a toasty, savory note that boosts the potatoes’ umami as they cook.
When the oil is hot, add the potatoes and minced garlic and sauté them. Giving the potatoes a quick sauté helps form a slight crust so the seasoning clings better. It also adds a nutty aroma that becomes the flavor base.
Add tuna and onions to deepen the flavor
Once the potatoes start to brown a little, add thinly sliced onions and the drained tuna. As the onions cook, they release sweetness that softens the overall seasoning. The tuna amps up the umami, so cooking it with the potatoes creates a far richer taste.
Gently fold the tuna in so it spreads naturally between the potatoes instead of breaking up completely. That way, the finished braise has a pleasant mix of textures from both potatoes and tuna.
Add the seasoning and simmer gently
Now add the sauce. Stir in 1 tablespoon gochujang, 2 tablespoons soy sauce, and 3 tablespoons corn syrup (or rice syrup). Add 1 tablespoon of the tuna liquid for extra depth. After adding the sauce, simmer over medium-low heat for about 10 minutes.
As the potatoes finish cooking, the sauce will thicken and cling to their surface. Give the pan a gentle shake now and then so the seasoning distributes evenly. Low-and-slow is the way to go—cooking too hot won’t allow the flavors to sink into the potatoes.
Enjoy it as an irresistible rice side
Serve the finished tuna potato braise warm for the best experience. Tender potatoes, a sweet-and-salty glaze, and tuna’s savory punch make this a perfect rice companion.
Finish with a drizzle of sesame oil or a sprinkle of toasted sesame seeds if you like. Just adding tuna to a simple potato braise elevates it into a dish with much richer flavor. With a few humble ingredients and the right technique, this becomes one of the most popular sides at the table.
