Healthy Tuna Recipes | Tuna & Sweet Potato Meal Prep

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Try this seared tuna steak with pink peppercorns and sweet potato wedges for a batch of healthy lunches. And don’t forget to check out more healthy tuna recipes and delicious fitness recipes.

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tuna steak recipe

Makes: 4 meals


For the sweet potatoes:

  • 4 large sweet potatoes
  • 1 tbsp. plain flour
  • 1/2 tsp. salt
  • 1/2 tsp. black pepper
  • 1/2 tbsp. coconut oil (melted)

For the rest:

  • 4 5 oz. tuna steaks
  • 2 tbsp. pink peppercorns
  • 1 tsp. coarse sea salt
  • 1 tbsp. coconut oil
  • 1 lemon (cut into wedges)


1. First, prepare the sweet potatoes. Scrub clean each potato and prick each all over with a fork. Place onto a microwavable plate and microwave on high for 4-5 minutes, then remove from the microwave and allow to cool for a minute or two.

2. Once cool enough to touch, cut the sweet potatoes into wedges. Sprinkle the flour, salt, pepper and melted coconut oil over the wedges and shake them about a little to coat them (this will make them super-crispy). Pop them onto a baking tray and bake at 390°F for 15-20 minutes.

3. When the sweet potato fries are nearly ready, it’s time to cook your tuna steaks. Crush the peppercorns using a pestle and mortar, or if you don’t have one, you can place them onto a board and use a rolling pin to crush them.

4. Coat each steak with pink peppercorns and sea salt, then place a large frying or griddle pan onto a high heat with the coconut oil. When the pan just about begins to smoke, add the tuna steaks and fry on each side for 45 seconds if you prefer seared tuna, or 2 minutes on each side if you prefer it cooked through.

5. Serve with lemon wedges and your favorite vegetables, then divide the tuna steaks and sweet potato wedges amongst meal prep boxes.

Store in airtight containers in the refrigerator for up to 3 days. When ready to eat, remove the lid and place it loosely back on top, leaving a little gap. Microwave on high for 3 1/2 minutes or until piping hot. Allow to stand for 1 minute before eating.

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PER MEAL (with mixed vegetables)

Healthy Tuna Recipes | Tuna & Sweet Potato Meal Prep

Nutritional Facts

Amount per serving

Calories 463kcal 171 Calories from Fat
% Daily Value *
Total Fat19g29%
Total Carbohydrates44g15%

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Jennifer Blow

Jennifer Blow

Editor & Qualified Nutritionist

Jennifer Blow is our editor and UKVRN Registered Associate Nutritionist – the UK’s register of competent and qualified nutrition professionals. She has a Bachelor of Science in Nutritional Science and a Master of Science by Research in Nutrition, and now specialises in the use of sports supplements for health and fitness, underpinned by evidence-based research. Jennifer has been quoted or mentioned as a nutritionist in major online publications including Vogue, Elle, and Grazia, for her expertise in nutritional science for exercise and healthy living. Her experience spans from working with the NHS on dietary intervention trials, to specific scientific research into omega-3 fatty acid supplementation and also the effect of fast foods on health, which she has presented at the annual Nutrition Society Conference. Jennifer is involved in many continuing professional development events to ensure her practise remains at the highest level. Find out more about Jennifer’s experience here: In her spare time, Jennifer loves hill walking and cycling, and in her posts you’ll see that she loves proving healthy eating doesn’t mean a lifetime of hunger.

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