Dinner

Tuna Steak with Chimichurri and Sweet Potato

Name: Tuna Steak with Chimichurri and Sweet Potato
Prep time: 15 min
Total time: 15 min
Yield: 1 serving
Ingredients: 160 g Tuna steak; 200 g Sweet potato; 10 g Olive oil; 1 clove, about 3 g Garlic; A large handful, chopped finely Fresh parsley; One teaspoon Dried oregano; One tablespoon Red wine vinegar; A pinch Chilli flakes

Grilled tuna steak with a sharp parsley and oregano chimichurri, and sweet potato wedges roasted alongside. 42 g of protein for 442 kcal.

Calories: 442kcal
Protein: 42g
Fat: 12g
Carbs: 41g

Per serving, makes 1. 15 minutes of work, then thirty minutes in the oven. Published 8 September 2026.

Allergens

Fish
Sulphites

Flags follow UK labelling rules and come from the ingredients as listed, not from any particular brand. Check the packet before cooking for somebody with an allergy.

Ingredients

Tuna steak160 g
Weighed raw.
Sweet potato200 g
Raw, peeled weight.
Olive oil10 g
Most of it goes into the chimichurri, which is an oil-based sauce. Ten grams is under a tablespoon.
Garlic1 clove, about 3 g
Fresh parsleyA large handful, chopped finely
Dried oreganoOne teaspoon
Red wine vinegarOne tablespoon
Chilli flakesA pinch

Method

Heat the oven to 220°C. Cut the sweet potato into wedges, toss with a teaspoon of the oil and salt, and roast for thirty minutes, turning once.
Stir the parsley, oregano, grated garlic, vinegar, chilli flakes, the rest of the oil and a pinch of salt together. Leave it to sit while the potatoes cook.
Season the tuna and grill it under a hot grill, or in a smoking-hot griddle pan, for two minutes a side.
Rest for two minutes, slice, and spoon the chimichurri over with the wedges alongside.

Worth knowing

Chimichurri is normally made with a lot more oil than this. Vinegar and a fine chop of the parsley carry it at 10 g.
Sweet potato at 200 g is 41 g of carbohydrate, about the same as the same weight of white potato. The difference is mostly sugar rather than starch.

Other dinner recipes that share ingredients with this one, or every dinner between 300 and 450 calories a serving.

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Macros are calculated from the weights listed above using standard food composition values, and will shift with your own brands and measuring. Weigh what you can. This is a recipe, not dietary advice. The full health disclaimer is below.