Whole30 Classic Tuna Sub

Elevate your lunch game with this Whole30 Classic Tuna Sub—a fresh and healthy twist on the traditional submarine sandwich! This quick and satisfying recipe swaps out bread for crisp romaine lettuce leaves, creating the perfect low-carb, gluten-free vessel for the creamy, flavorful tuna filling. Packed with protein-rich canned tuna, creamy avocado, zesty Dijon mustard, and a hint of tangy lemon juice, every bite is bursting with freshness and nutrition. Diced celery and red onion add a delightful crunch, while cherry tomato halves bring a touch of natural sweetness. Ready in just 15 minutes, this no-cook meal is perfect for meal prep, a light lunch, or even a guilt-free snack. Plus, it’s Whole30-approved, making it an excellent choice for those embracing clean eating. Enjoy this wholesome, hands-on sub alternative that’s as fun to eat as it is to make!

Nutriscore Rating: 80/100

Prep Time:15 mins

Cook Time:0 mins

Total Time:15 mins

Servings: 4

Ingredients

• 2 5-ounce cans Canned tuna packed in water
• 1 medium Avocado
• 2 tablespoons Dijon mustard
• 1 medium Celery stalk
• 0.25 small Red onion
• 1 tablespoon Lemon juice
• 0.25 teaspoon Salt
• 0.25 teaspoon Black pepper
• 8 large leaves Romaine lettuce leaves
• 8 pieces Cherry tomatoes

Directions

Step 1

Drain the canned tuna thoroughly and add it to a medium-sized mixing bowl.

Step 2

Halve the avocado, remove the pit, and scoop the flesh into the bowl with the tuna. Mash the avocado and tuna together with a fork until well combined.

Step 3

Dice the celery stalk finely and add it to the tuna mash. Similarly, finely dice the red onion and add it to the mixture.

Step 4

Add the Dijon mustard, lemon juice, salt, and black pepper to the bowl. Mix thoroughly until all the ingredients are well combined and the mixture is creamy.

Step 5

Wash and dry the romaine lettuce leaves. Lay them flat and spoon an even amount of the tuna mixture onto each leaf.

Step 6

Cut the cherry tomatoes in half and place a couple of halves on top of the tuna mixture on each lettuce leaf.

Step 7

Carefully roll or fold each lettuce leaf around the tuna and serve immediately for the freshest taste.

Nutrition Facts

Serving size	(764.1g)

Amount per serving	% Daily Value*
Calories	690.2

Total Fat 31.4g	0%
Saturated Fat 4.0g	0%
Polyunsaturated Fat 2.7g
Cholesterol 100.1mg	0%
Sodium 2162.4mg	0%
Total Carbohydrate 25.9g	0%
Dietary Fiber 14.6g	0%
Total Sugars 7.6g
Protein 79.2g	0%

Vitamin D 226.8IU	0%
Calcium 120.0mg	0%
Iron 4.7mg	0%
Potassium 2204.7mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 40.2%

Protein: 45.1%

Carbs: 14.7%