Keto Tuna Melt
Keto Tuna Melt is an easy keto lunch recipe made with fresh tomato, tuna salad, and melted cheese. It’s the perfect addition to your keto meal plan.
This easy recipe for Keto Tuna Melt makes a great keto lunch or a light keto dinner. It has all of the classic flavors of a tuna melt without the bread and I promise you that it’s so good you won’t even miss it!
This is one of those recipes that is the best in the summer when you can get fresh, ripe tomatoes at peak season but if you’re like me you’re going to enjoy it so much you’re going to put it in your keto lunch rotation along with Avocado Tuna Salad, and our Keto Club Sandwich.
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What You Need
- Canned Tuna – I prefer albacore tuna in water but you can use any canned tuna. If you use a seasoned tuna just make sure you check the carb count on the back!
- Mayonnaise – Every tuna salad needs a little mayonnaise and this is also how we are adding some fat to all of that lean tuna to make the recipe keto.
- Red Onion – Just a little red onion is all you need to add a bit of crunch, and a sharp slightly sweet flavor.
- Celery – this adds a little more crunch and some extra fiber to the meal.
- Dill Relish – Make sure you are using dill relish NOT sweet relish. Dill relish should have no added sugars. If you can’t find it in the store you can buy dill pickles and finely chop them to make your own relish.
- Tomato – Use a large, perfectly ripe tomato.
How to Make It
Make the Tuna Salad – In a bowl combine the tuna, mayonnaise, red onion, celery, and dill relish. Stir to combine.
Assemble – Place the four tomatoes slices on a baking sheet and sprinkle a little pinch of salt on top of each tomato slice. Add 1/4 of the tuna mixture on top of each tomato slice. Top each one with a slice of cheese.
Bake – Set oven to Broil and place the baking sheet in the oven. Cook for 3-5 minutes, or until the cheese is melted on top.
Yes, absolutely! We love cheddar cheese, and it is one of our go to types of cheese for many recipes. But there are so many incredible types of cheese out there that are begging to be put on your tuna melt! Consider trying these ideas:
Mozzarella – Anything that has mozzarella and tomato in the same recipe is bound to be amazing!
Swiss – The tanginess of swiss cheese is impressive for tuna melts too.
Provolone – Melted provolone is so creamy and delicious, it’s a great option.
Colby Jack – Using Colby Jack is a fantastic idea because it adds lots of color and flavor too.
Parmesan – So I pretty much love parmesan on anything! Use some shredded parmesan, or sliced. Keep in mind parmesan is pretty salty, so you won’t need a ton of it.
Yes, canned tuna is a great option for a keto or low carb diet. It has a very low carb content and it’s easy to store. You don’t even need to refrigerate the cans.
It’s also really inexpensive. It’s much cheaper than fresh cuts of tuna, and if you buy the generic brands, you can save even more money.
All things considered, if you eat a low carb diet, it’s a fabulous idea to add some canned tuna to it.
Yes! While a lot of tomato based items have added sugar making them not keto-friendly, fresh tomatoes have about 2–3 grams of net carbs per 3.5 ounces. This makes them a great addition to your keto meal plan.
Yes, these open-faced tuna melts are very healthy and provide you with much-needed vitamins and minerals. Tuna has plenty of nutrients by itself like omega-3 fatty acids, vitamin A, potassium, iron, vitamin B6, and vitamin B12. Can you believe it’s that good for you and tastes so yummy?
Tomatoes not only add lots of color to your tuna melts, but they are also filled with calcium, potassium, vitamin C, vitamin A, fiber, and phosphorus.
Cheddar cheese isn’t just amazing on sandwiches; it’s rich in protein, calcium, vitamin A, and good fats. That’s why it’s so essential for a low carb diet.
You may not even realize it, but the mayonnaise has some nutrients too. It’s a fantastic source for vitamin E. Plus, it is high in good fats, so it makes a lovely condiment for many recipes.
So, this tuna melt recipe is a great meal to add to your recipe rotation. It is loaded with nutrient-rich ingredients, and there is no guilt chowing down one or two. 
You can store them in the refrigerator for 3-4 days. Keep them airtight in a container with a sealed lid so that they last the longest.
Always check before serving to make sure that they haven’t gone bad. Some clues to look for are that bad tuna melts usually have a really strong pungent fishy odor, they seem super watery, or there is noticeable mold growing. If you notice any of these issues, toss them and make a new batch.
Yes, but I do think they are best served immediately. If you want to reheat a tuna melt you can simply reheat the tuna melt in the microwave for 1 or 2 minutes until it’s hot. Use a microwave-safe plate and cover it with a paper towel.
Another option for reheating is to warm the oven up to 350 degrees F. Then, place the tuna melts onto a baking dish and warm them for 5-10 minutes or until the cheese has melted again, and it’s hot. If you have the time to reheat them in the oven, that is a great way to do it, but it’s fine to use the microwave if you don’t.
Another thing I want to point out is that you can absolutely eat a tuna melt cold as well, which is what I usually do. So if you’re going to take it to work and enjoy it for lunch, you don’t even have to bother with heating it up. Try it and see how you like it!
Looking for More Easy Keto Recipes?
- Avocado Tuna Salad
- Meat Lover’s Keto Stuffed Peppers
- Keto Club Sandwich
- Keto Roast Beef and Asparagus Roll Ups
- Keto Chicken Gyro Bowl
- Keto Antipasto Salad
- Avocado Chicken Salad
- More Keto Recipes…
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Keto Tuna Melt
Ingredients
- 12 ounces Canned Tuna
- 3 tablespoons Mayonnaise
- 1 tablespoon Finely diced red onion
- ¼ cup Sliced celery
- 2 tablespoons Dill pickle relish
- 4 Tomato slices, from a large tomato
- ¼ teaspoon Salt
- 4 slices Cheddar Cheese
Instructions
- In a bowl combine the tuna, mayonnaise, red onion, celery, and dill relish. Stir to combine.
- Place the four tomatoes slices on a baking sheet and sprinkle a little pinch of salt on top of each tomato slice.
- Add 1/4 of the tuna mixture on top of each tomato slice.
- Top each one with a slice of cheese.
- Set oven to Broil and place the baking sheet in the oven. Cook for 3-5 minutes, or until the cheese is melted on top.
- Serve immediately.
Nutrition
Awesome great recipe that is super quick and easy. I added some avocado to the top with some old white cheddar. The tuna was a dill and lemon type. DELICIOUS!
As a keto beginner, I can already tell this will be one of my frequents. So so good! Thank you!