Tuna with peppery tomatoes & potatoes

Tuna with peppery tomatoes & potatoes

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(26 ratings)

Prep: 10 mins Cook: 25 mins


Serves 4
Sweet peppers make a great addition to grilled meats and fish. A great al fresco meal with fresh flavours

Nutrition and extra info

  • Omega-3, 2 of 5-a-day, veg can be frozen
  • Easily halved

Nutrition: per serving

  • kcal371
  • fat11g
  • saturates2g
  • carbs31g
  • sugars11g
  • fibre4g
  • protein40g
  • salt0.48g
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  • 4 tuna steaks
  • 1 tbsp olive oil
    olive oil

    Olive oil

    ol-iv oyl

    Probably the most widely-used oil in cooking, olive oil is pressed from fresh olives. It's…

  • 3 garlic cloves, crushed
  • few thyme sprigs


    This popular herb grows in Europe, especially the Mediterranean, and is a member of the mint…

  • 500g bag new potato, sliced about 1cm thick
    New potatoes

    New potatoes

    n-ew po-tate-oes

    New potatoes have thin, wispy skins and a crisp, waxy texture. They are young potatoes and…

  • 2 red peppers, cut into large chunks
  • 1 red onion, cut into eighths
  • 1 green chilli, deseeded and chopped
  • 400g can cherry tomato


  1. Heat oven to 220C/fan 200C/gas 7 and put in a roasting tin to heat up. Put the tuna in a shallow dish with half the oil, two-thirds of the garlic and leaves from 1 sprig of thyme. Leave to marinate while you cook the veg.

  2. Put the potatoes, peppers, onion and chilli into the roasting tin with the remaining oil, toss to coat, then roast for 20 mins. The potatoes should be tender or very nearly there. If not, give them another 5 mins (the cooking time can depend on the variety of potato). Add the remaining garlic and thyme to the pan, let them sizzle, stir in the tomatoes, then cook for 5 mins more until the sauce has reduced a little. Season to taste.

  3. With a few mins to go, heat a griddle or frying pan, wipe most of the garlic marinade off the fish with kitchen paper, season, then sear for 1 min each side for medium or longer if you prefer. Serve on top of the veg.

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Comments, questions and tips

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21st Oct, 2016
Really loved this dish, used a george foreman to grill the tuna. I didn't use thyme or chopped tomatoes with the potatoes but instead used a dash of soy with the red onions, red pepper, chilli and new potatoes and it all went really well together.
27th Oct, 2014
Very nice indeed, just made on spec, so hadn't bought in the ingredients, I happened to have almost everything I needed bar the fresh green chilli...just used some chilli flakes instead...lovely
Auntie Ellen
16th May, 2012
We really liked this, tuna was a little bland though. Froze the left over veggies and had them with cajun salmon - even yummier! Will def make again. Dead easy too. Will add more spuds next time.
1st Sep, 2010
I used fresh skinned tomatoes and the result was excellent
20th Apr, 2010
Just made this. took advice and i par boiled the potatoes first. thought it was an easy dish but only ok. thought it was a bit bland and missing something. I'm not sure what though...
18th Jul, 2009
Very delicious.. veggies were yummy
7th Feb, 2009
Love this recipe - so simple but delicious
4th Feb, 2009
This recipe was soooooooooo goooooooooooood - it was a good dinner that was really light. I cooked the tuna for less than a minute each side for the thinner steaks because they have to remain pink in the middle to be at their most delicious! I didn't have any problems with the potatoes taking longer than anything - I followed the recipe exactly and everything turned out perfect! I think I added more thyme than the recipe said but that's about all i changed!
29th Jan, 2009
This was delicious......I used a combination of cherry tomatoes and a small tin of chopped tomatoes, added five mins from the end with the garlic, chilli & extra thyme. Would definitely do again.
28th Dec, 2008
This is a fantastic supper dish. Easy to make and delicious. parboiling is definitely the eay to go. Sainsbury's also sell cherry toms in tins. have made this loads of times already.


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egreenwood20's picture
11th Jun, 2014
Make with sweet potato instead of regular potatoes for an even sweeter addition to the salty tuna!
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