This Easy Tuna Snack is homemade tuna salad piled on top of a freshly sliced tomato, topped with cheese, and baked until the cheese is melted and bubbly. If you love tuna, be sure to try my Tuna Pasta Salad

Fork & Knife Cutting Into a Tomato Tuna Snack

Easy Tuna Snack

In this tuna snack, it’s the tomato that holds the creamy tuna salad and ooey-gooey cheese. There is no bread that needs to be toasted, and this is more of a snack than a meal. However, this would be a delicious light lunch paired with Black Bean Soup or Tomato Soup.

Raw Ingredients for Easy Tuna Snack with Tomato

Easy Tuna Snack Ingredients

There are plenty of health benefits to eating tuna, including heart health and boosting the immune system, just to name a couple. So, get out your cans of tuna and the rest of the ingredients to get the easy snack recipe ready to enjoy.

Tuna: You can use tuna in water or oil (since you will be draining it). The tuna packets would also work for this recipe.

Mayonnaise: If you don’t have any on hand, make your own homemade mayonnaise.

Pickles: I used dill pickles for this recipe. 

Dijon mustard: You could also use yellow mustard, but it will not have as tangy of a flavor.

Tomatoes: I like beefsteak tomatoes because of their larger size.

Process Steps for Tomato Tuna Snack

How to Make this Easy Tuna Snack

Just as the name states, this recipe is easy! And, it is a pretty healthy snack that can give you some energy and get your metabolism going. To make this easy tuna snack, set the oven to 450°F and line a baking sheet with parchment paper.

To make the tuna salad, drain the tuna and combine it with the mayonnaise, diced celery, diced pickles, and dijon mustard in a medium bowl. Set that aside as you slice the tomatoes.

I used two tomatoes to get six slices of tomato to hold the tuna mixture. Lay the slices of the tomato on the parchment-lined baking sheet. Top the tomato slices with the tuna mixture and a slice of cheese. Bake for 7-10 minutes, or until the cheese is bubbly. Serve hot.

Plate of Easy Tuna Snack - Tomatoes with Tuna and Cheese

How to Pick the Best Tomatoes

Since the tomato is the base that holds all the tuna salad and cheese, you want to choose the freshest tomatoes you can find. I prefer beefsteak tomatoes for this recipe because they are a good size to hold the toppings. When choosing any kind of tomatoes at the grocery store, keep these tips in mind:

  • A tomato should feel heavy for its size when you pick it up (but don’t squeeze it).
  • They should have smooth skin with no bruises or blemishes.
  • The leaves on the stem should be green.
  • There should be an earthy scent when you smell the tomato close to the stem.
  • Tomatoes are best when in season (July and August).

Cut into Easy Tuna Snack Showing Tuna and Tomato under melted Cheese

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Easy Tuna Snack

Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
This Easy Tuna Snack is homemade tuna salad piled on top of a freshly sliced tomato, topped with cheese, and baked until the cheese is melted and bubbly.


  • 2 cans (5 ounces each) tuna, drained
  • ½ cup (116 g) mayonnaise
  • ½ cup diced celery
  • ¼ cup diced dill pickles
  • 1 teaspoon dijon mustard
  • 6 slices cheddar cheese
  • 2 medium tomatoes, sliced (for a total of 6 slices)


  • Preheat oven to 450°F.
  • In a medium bowl, combine the tuna, mayonnaise, celery, pickles, and mustard. Mix well.
  • On a parchment-lined baking sheet, set out slices of tomato, top with tuna mixture, and a slice of cheese.
  • Bake for 7-10, or until cheese is hot and bubbly

Did you make this recipe?

You can tag me at @iamhomesteader.

This Tomato Tuna Snack recipe was inspired by @aldentediva on TikTok.

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