This keto tuna salad is a quick and easy meal that's perfect for those following a low-carb diet. It's packed with flavor and can be enjoyed on its own, in a lettuce wrap, or even as a filling for avocado halves. The combination of creamy mayonnaise, tangy dijon mustard, and fresh herbs makes this dish a delightful and satisfying option for lunch or dinner.
While most of the ingredients for this keto tuna salad are common pantry staples, you might need to pick up fresh dill if you don't already have it at home. Fresh dill adds a burst of flavor that dried dill simply can't match. Additionally, make sure you have dijon mustard on hand, as it provides a unique tanginess that regular mustard won't deliver.

Ingredients For Keto Tuna Salad Recipe
Tuna: The main protein source, providing a rich and savory flavor.
Mayonnaise: Adds creaminess and helps bind the ingredients together.
Dijon mustard: Offers a tangy kick that enhances the overall taste.
Celery: Adds a crunchy texture and a fresh flavor.
Red onion: Provides a sharp, slightly sweet taste and a bit of crunch.
Fresh dill: Adds a burst of herby freshness that elevates the dish.
Salt: Enhances the flavors of all the ingredients.
Black pepper: Adds a bit of heat and depth to the salad.
Technique Tip for Making This Recipe
When preparing this keto tuna salad, ensure that the celery and red onion are finely chopped to achieve a uniform texture and even distribution of flavors. This will help each bite have a balanced taste and prevent any one ingredient from overpowering the others. Additionally, using a fork to mix the tuna with the other ingredients can help break up any large chunks, resulting in a smoother and more cohesive salad.
Suggested Side Dishes
Alternative Ingredients
tuna - Substitute with canned salmon: Canned salmon provides a similar texture and flavor profile while still being keto-friendly.
mayonnaise - Substitute with Greek yogurt: Greek yogurt offers a creamy texture and tangy flavor, while also being lower in fat and calories.
dijon mustard - Substitute with yellow mustard: Yellow mustard has a milder flavor but still adds a tangy kick to the salad.
celery - Substitute with cucumber: Cucumber provides a similar crunch and refreshing taste, making it a good low-carb alternative.
red onion - Substitute with green onion: Green onion has a milder flavor and adds a nice color contrast to the salad.
fresh dill - Substitute with parsley: Parsley offers a fresh, slightly peppery flavor that complements the other ingredients well.
salt - Substitute with soy sauce: Soy sauce adds a savory umami flavor while also providing the necessary saltiness.
black pepper - Substitute with white pepper: White pepper has a slightly different flavor profile but still adds the necessary heat and spice.
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How to Store or Freeze This Dish
- To store your keto tuna salad, transfer it to an airtight container. This helps maintain its freshness and prevents any unwanted odors from seeping in.
- Place the container in the refrigerator. The salad will stay fresh for up to 3-4 days. Always give it a quick sniff and check for any changes in texture or color before consuming.
- If you wish to freeze the tuna salad, it’s best to do so without the mayonnaise. The texture of mayonnaise can change when frozen and thawed, leading to a less desirable consistency.
- To freeze, place the tuna mixture (without mayonnaise) in a freezer-safe bag or container. Ensure you remove as much air as possible to prevent freezer burn.
- Label the container with the date so you can keep track of its storage time. The tuna salad can be frozen for up to 1 month.
- When ready to use, thaw the tuna salad in the refrigerator overnight. Once thawed, mix in the mayonnaise and other fresh ingredients like celery and red onion.
- Always give the thawed tuna salad a good stir to reincorporate any separated ingredients and ensure an even texture.
How to Reheat Leftovers
- Gently stir the tuna salad to redistribute any separated mayonnaise and mustard.
- Place the tuna salad in a microwave-safe dish. Cover it loosely with a microwave-safe lid or a damp paper towel to prevent drying out.
- Microwave on medium power for 30-second intervals, stirring in between, until the tuna salad is warmed through. Be careful not to overheat, as this can cause the mayonnaise to separate.
- Alternatively, transfer the tuna salad to a small saucepan. Heat over low heat, stirring frequently, until warmed through. This method helps maintain the texture of the celery and red onion.
- If you prefer a cold tuna salad, simply remove it from the refrigerator and let it sit at room temperature for about 10-15 minutes before serving. This takes the chill off without compromising the flavors and textures.
Essential Tools for Making This Recipe
Mixing bowl: A large bowl to combine all the ingredients together.
Can opener: To open the can of tuna.
Measuring spoons: To measure out the mayonnaise, dijon mustard, and other ingredients accurately.
Cutting board: A surface to chop the celery, red onion, and fresh dill.
Chef's knife: A sharp knife to finely chop the vegetables and herbs.
Spatula: To mix the ingredients thoroughly.
Refrigerator: To chill the tuna salad if you are not serving it immediately.
How to Save Time on Making This Dish
Use pre-chopped veggies: Save time by using pre-chopped celery and red onion available at most grocery stores.
Batch prep: Make a larger batch of tuna salad and store it in the fridge for quick meals throughout the week.
One-bowl method: Mix all ingredients in the same bowl to minimize cleanup time.
Pre-measure ingredients: Measure out the mayonnaise, dijon mustard, and spices ahead of time to streamline the process.
Use a food processor: Quickly chop the celery and red onion using a food processor.

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 tablespoon Fresh Dill chopped
- to taste Salt
- to taste Black Pepper
Instructions
- 1. In a mixing bowl, combine the drained tuna, mayonnaise, Dijon mustard, chopped celery, red onion, and fresh dill.
- 2. Mix well until all ingredients are evenly distributed.
- 3. Season with salt and black pepper to taste.
- 4. Serve immediately or chill in the refrigerator for later.
Nutritional Value
Keywords
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