These tuna cakes are the perfect way to use up leftover mashed potatoes. And they’re so easy to make you’ll have more than enough time to make a lemon-dill aioli dip from scratch.
Hello, and welcome to yet another edition of ugly-but-tasty canned tuna dinners from my childhood. Previously, we have featured Tuna Newberg. Today, we’re here to discuss Tuna Cakes (Patties) with Lemon-Dill Aioli. These breadcrumb-coated tuna patties get their structure from the addition of mashed potatoes. They’re easy to make, fun to assemble, and reheat nicely as leftovers. Even better? They’re affordable af, and use largely shelf-stable ingredients that are easy to keep on-hand.
Tuna cakes are only as complicated as you choose to make them. I’ve written the recipe to start from scratch, using 2 medium russet potatoes, which you prep in the microwave. But, like I said, they’re also a great way to use up leftover mashed potatoes or you can use a packet of prepared instant mashed potatoes in a pinch.
I honestly can’t remember what my mom used to serve these with and she can’t remember where the recipe came from. But, what I love about a simple af recipe like this is that it’s a great opportunity to put more effort into sides, sauces, or dips. In this case, I went with a rich, lemon-dill aioli. Which I made from scratch. I know! It seems like a lot of work, but if you have an immersion blender this recipe is going to blow your mind. It’s so simple, but the end result takes this budget meal to a whole new level without breaking the bank.
That said, if you don’t have an immersion blender or don’t feel like making aioli from scratch, scroll down to the recipe notes for how to adapt to use jarred mayo. Or, heck, serve them with gravy. They’ll be great either way!
How to make Tuna Cakes
First, you need to prepare the potatoes. If you’re using leftover mashed potatoes or instant mashed potatoes, you’re already one step ahead here. If you’re starting from scratch, you’ll wash your potatoes, pierce their sides (so they don’t explode) and microwave them in a bowl with a small amount of water for 10 minutes on one side, then 10 minutes on the other. I picked up this method from Priya Krishna’s Indian-ish cookbook and it honestly makes potato prep so much easier. Once they’re out of the microwave, you’ll let them cool slightly and then the skins should just peel right off.
Once they’re cool enough to touch, you mash them. If you don’t have a potato masher, you can use your immersion blender, a muddler, two forks, or even a meat tenderizer. You can add the salt and up to a 1/4 cup milk here if the potatoes need a little help mashing, but it’s actually a good thing if they aren’t perfectly smooth and creamy — you want them to have some structure to them.
In a separate bowl, you’ll mash the drained tuna and a squeeze of lemon juice with a fork to break up any chunks before adding it, along with the rest of the ingredients (minus the bread crumbs) to the mashed potatoes. Once they’re all combined and mixed together, use your hands to form the mixture into balls, roll the balls in bread crumbs, and flatten them into discs in a large casserole dish.
They cook for 45-50 minutes total at 400F degrees. You’ll need to flip them once half way through the bake time, but otherwise that’s it. Now you’ve got plenty of time to make that lemon-dill aioli.
How to make lemon-dill aioli
Aioli is basically just fancy, garlicky mayo. (Okay, it’s actually a little more complicated than that.) But for the purposes of this blog post that’s how we’re going to treat it. Mayo is an emulsion of egg yolk, olive oil, and some sort of acid like lemon juice or vinegar. You make an emulsion by whipping or whisking two liquids that don’t normally combine (like water and oil) together so quickly that they have no choice but to mix. Some emulsions are unstable — meaning the two ingredients will eventually separate again — but mayo is a stable emulsion. Once you whip it (whip it good) there’s no separating it back into its original ingredients.
All that is to say that while you can make mayo by hand with a whisk, I swear by J. Kenji Lopez-Alt’s Two-Minute Mayonnaise from the Serious Eats website. First, you pulse the egg yolk, lemon juice, salt, and dry mustard together using the immersion blender. Then, you begin adding the oil. It’s crucial that you don’t add the oil too quickly or the emulsion will break.
With the immersion blender running, slowly drizzle in half of the oil. If you have trouble holding the blender AND the oil AND the cup you’re blending in, put the cup on top of a folded kitchen towel on your counter to hold it in place. Once you’ve incorporated the first half of the oil, add the second half of the oil with the blender running. You can add it a little faster than you did the first time, since the mixture has begun to stabilize, but don’t add it all at once or you risk it breaking. If you prefer a thinner mayo texture, add more oil or additional lemon juice until you achieve your desired consistency and flavor.
Once you have your mayo, add the dill and smashed garlic and pulse to combine. Then, taste it. If the lemon flavor is too subtle, add a squeeze more lemon juice. If it needs salt, add salt. Want some pepper? Add pepper. More garlic? Add more garlic. Heck, you could even add a pinch of garlic powder. If it’s too lemony, add more oil, the way you did before — drizzling it in as the immersion blender runs. Make each adjustment a small amount at a time, tasting in between, until you reach your desired flavor and consistency.
Serve the tuna cakes hot and the aioli cool or room temp for dipping.
Tuna Cakes with Lemon-Dill Aioli
Yield: 12 tuna cakes, ~1/2 cup lemon-dill aioli.
Tuna cakes also pair well with gravy.
- Tuna Cakes
10-12 oz tuna (one large can or two 5 oz cans)
Squeeze of lemon juice
2 medium sized russet potatoes (5-6 oz each)
ALT: 2 cups leftover mashed potatoes or 1 packet of prepared mashed potato mix.
1/4 cup milk (optional, to make the potatoes easier to mash)
2 eggs, beaten
1 small white onion or 1/2 large white onion, grated
1/4 cup fresh parsley, chopped
1/4 tsp Paprika
1/2 tsp oregano
1 tsp salt
1/4 tsp pepper
1 cup bread crumbs
- Lemon-Dill Aioli
1 egg yolk
1/2 cup oil
1/2 tsp lemon juice
1/4 tsp salt (+ more to taste)
1/4 tsp dry mustard (optional)
1 clove garlic, grated or pressed
1/2 tsp dill weed
Freshly ground black pepper (to taste)
- Preheat oven to 400F.
- Wash and dry potatoes. Use a fork to piece each side of the potatoes 5 times. Place in microwave safe bowl filled with approx 1/2-3/4 cup water. Microwave on high for 10 minutes. Flip potatoes over. Microwave an additional 10 minutes. Remove from bowl, let cool 10 minutes. When cool enough to handle, peel with your hands.
- Mash potatoes in a medium-sized bowl. If they’re lumpy, add up to 1/4 cup milk to help smooth them out. It’s okay if some lumps still remain.
- Open and drain tuna. Mash in a bowl with a squeeze of lemon juice. Then, add the tuna to the mashed potatoes along with the well-beaten eggs, paprika, salt, pepper, parsley, oregano, and grated onion. Mix well to combine.
TIP: Before you add the eggs, taste the mixture and adjust the seasoning to taste.
- Pour bread crumbs into a wide, shallow bowl or Tupperware container. Use a large spoon to scoop tennis-ball sized amounts of the mixture into your hands, and shape them into balls. Roll each ball in the bread crumbs to coat. Place the balls in a greased casserole dish, then gently flatten into discs approx 1/2″ high.
- Bake tuna cakes at 400F for 45-50 minutes, flipping halfway through.
- Lemon-Dill Aioli
- Combine egg yolk, salt, dry mustard, and lemon juice in a wide-mouth jar or in the container attachment of your immersion blender. Insert the immersion blender and pulse a few times to combine.
- Very slowly, drizzle in 1/4 cup (half) of the olive oil while the immersion blender is running. Once the emulsion has formed, pour in the other 1/4 cup oil, again with the immersion blender running. You can add it faster than you did the first time, but don’t dump it in all at once.
- Add dill, garlic, and pepper, and pulse to combine. Adjust seasoning to taste.
- If your tuna mixture is too wet to shape into balls, you can sprinkle bread crumbs directly into the casserole dish in 4″ dots, spoon the mixture on top of the bread crumbs, then sprinkle more bread crumbs overtop the discs.
- If you don’t want to make mayo from scratch or don’t have an immersion blender simply omit the egg yolk and olive oil from the aioli recipe and use 1/2 cup mayo instead. Whisk well.
- To reheat, place on a sheet tray in the oven at 350F for 15-20 minutes.