This keto tuna salad is a quick and easy meal that's perfect for those following a low-carb diet. It's creamy, flavorful, and packed with protein, making it a satisfying option for lunch or a light dinner. With just a few simple ingredients, you can whip up this delicious salad in no time.
If you don't usually keep dijon mustard or red onion in your pantry, you might need to pick them up at the supermarket. Dijon mustard adds a tangy depth of flavor, while red onion provides a subtle sweetness and crunch. Both ingredients are essential for achieving the perfect balance in this salad.

Ingredients For Keto Tuna Salad Recipe
Tuna: A protein-rich fish that forms the base of the salad.
Mayonnaise: Adds creaminess and richness to the salad.
Dijon mustard: Provides a tangy and slightly spicy flavor.
Celery: Adds a refreshing crunch and light flavor.
Red onion: Offers a mild sweetness and additional crunch.
Salt: Enhances the overall flavor of the salad.
Black pepper: Adds a hint of spice and depth.
Technique Tip for Making Tuna Salad
For an extra burst of flavor, try toasting the celery and red onion in a dry skillet over medium heat for a few minutes before adding them to the tuna salad. This will bring out their natural sweetness and add a subtle depth to the dish.
Suggested Side Dishes
Alternative Ingredients
tuna - Substitute with canned salmon: Canned salmon provides a similar texture and flavor profile while being equally keto-friendly.
mayonnaise - Substitute with Greek yogurt: Greek yogurt is a lower-fat alternative that still offers creaminess and tang, though it may slightly alter the flavor.
dijon mustard - Substitute with yellow mustard: Yellow mustard can be used for a milder taste, though it lacks the complexity of dijon.
celery - Substitute with cucumber: Cucumber provides a similar crunch and freshness, making it a good low-carb alternative.
red onion - Substitute with green onion: Green onion offers a milder flavor and can be easier on the digestive system for some people.
salt - Substitute with soy sauce: Soy sauce adds a salty umami flavor, though it will change the overall taste profile slightly.
black pepper - Substitute with white pepper: White pepper provides a similar heat but with a slightly different flavor, often described as more earthy.
Alternative Recipes Similar to Tuna Salad
How to Store or Freeze Your Tuna Salad
- To store your Keto Tuna Salad, transfer it to an airtight container. This will help maintain its freshness and prevent any unwanted odors from seeping in.
- Place the container in the refrigerator. Your salad will stay fresh for up to 3-4 days. This makes it a great option for meal prep!
- If you plan to freeze the tuna salad, be aware that the texture might change slightly. The mayonnaise can separate upon thawing, but it will still be safe to eat.
- For freezing, spoon the salad into a freezer-safe container or a resealable plastic bag. Make sure to remove as much air as possible to prevent freezer burn.
- Label the container with the date so you can keep track of its freshness. The tuna salad can be frozen for up to 1 month.
- When you're ready to enjoy your frozen Keto Tuna Salad, transfer it to the refrigerator to thaw overnight. This slow thawing process helps maintain the best texture.
- Once thawed, give the salad a good stir to reincorporate any separated ingredients. You might want to add a bit more mayonnaise or dijon mustard to refresh the flavor and texture.
- Always check the salad for any off smells or discoloration before consuming, as these are signs that it may have gone bad.
How to Reheat Leftovers
- If you prefer a warm tuna salad, gently heat it in a skillet over low heat. Stir frequently to ensure even warming without overcooking.
- For a quick and easy method, microwave the tuna salad on medium power for 30-second intervals, stirring in between until it reaches your desired temperature.
- Another option is to place the tuna salad in an oven-safe dish and warm it in a preheated oven at 300°F (150°C) for about 10 minutes. Cover the dish with foil to prevent it from drying out.
- If you enjoy a bit of a crunch, spread the tuna salad on a low-carb tortilla or keto bread and toast it in a toaster oven until warm and slightly crispy.
- For a unique twist, stuff the tuna salad into bell pepper halves and bake at 350°F (175°C) for 15-20 minutes, or until the peppers are tender and the filling is heated through.
Essential Tools for Making Tuna Salad
Mixing bowl: A large bowl used to combine all the ingredients together.
Can opener: A tool to open the can of tuna.
Measuring spoons: Used to measure out the mayonnaise, dijon mustard, and other seasonings accurately.
Chopping board: A flat surface to chop the celery and red onion.
Chef's knife: A sharp knife to finely chop the celery and red onion.
Spatula: Used to mix the ingredients together thoroughly.
Refrigerator: To store the tuna salad if you are not serving it immediately.
Time-Saving Tips for Making Tuna Salad
Use pre-chopped veggies: Save time by using pre-chopped celery and red onion from the store.
Batch preparation: Make a larger batch of tuna salad and store it in the fridge for quick meals throughout the week.
Efficient mixing: Use a fork to quickly break up the tuna and mix all ingredients evenly.
One-bowl method: Combine all ingredients in one bowl to minimize cleanup time.
Pre-measured condiments: Use pre-measured packets of mayonnaise and dijon mustard to speed up the process.

Keto Tuna Salad Recipe
Ingredients
Main Ingredients
- 1 can Tuna drained
- 2 tablespoon Mayonnaise
- 1 tablespoon Dijon mustard
- 1 stalk Celery chopped
- 1 tablespoon Red onion finely chopped
- 1 pinch Salt to taste
- 1 pinch Black pepper to taste
Instructions
- 1. In a mixing bowl, combine the drained tuna, mayonnaise, and Dijon mustard.
- 2. Add the chopped celery and finely chopped red onion to the bowl.
- 3. Mix everything together until well combined.
- 4. Season with salt and black pepper to taste.
- 5. Serve immediately or refrigerate for later.
Nutritional Value
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