Spicy tuna open sarnies recipe

Name: Spicy tuna open sarnies
Yield: Serves 2
Ingredients: 110g tin tuna steaks with a little spring water; 2 heaped tbsp light mayonnaise; 2 tbsp sriracha sauce; 1 tsp lime juice, plus wedges to serve (optional); 2 spring onions, trimmed and finely sliced; 1 small avocado, finely sliced; 2 slices Tesco Finest rye and mixed seed sourdough bread, toasted; 2 tsp sesame seeds, toasted

Created by The Tesco Recipes team

We've given the classic tuna sarnie a spicy twist with a limey sriracha mayo and served it as an open sandwich with avocado for an easy, modern twist. That's your next lunch sorted!

See method

Serves 2
Takes 10 mins
348 calories / serving

Dairy-free

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2 slices Tesco Finest rye and mixed seed sourdough bread, toasted

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Tesco Tuna Steaks with a Little Spring Water 110g
Any 3 for £3.50 Clubcard Price - Selected Tesco Drained Tuna Steak
(£10.64/kg)
Offer valid for delivery from 23/05/2026 until 31/12/2026
110g tin tuna steaks with a little spring water
£1.40
£12.73/kg
Tesco Light Mayonnaise 500Ml
Aldi Price Match
2 heaped tbsp light mayonnaise
£0.89
£1.78/litre
Tesco Sriracha Chilli Sauce 285G
2 tbsp sriracha sauce
£2.40
£8.42/kg
Tesco Limes Each
Aldi Price Match
1 tsp lime juice, plus wedges to serve (optional)
£0.23
£0.23/each
Tesco Bunched Spring Onions 100G
49p Clubcard Price
(£4.90/kg)
Offer valid for delivery from 08/09/2026 until 05/10/2026
2 spring onions, trimmed and finely sliced
£0.69
£6.90/kg
Tesco Ripe & Ready Avocado
1 small avocado, finely sliced
£0.69
£0.69/each
Tesco Sesame Seeds 100G
2 tsp sesame seeds, toasted
£1.20
£12.00/kg

Method

Mash the tuna in a bowl with the mayonnaise, 1 tbsp sriracha and the lime juice. Stir in the chopped spring onion whites and season with black pepper.
Arrange the sliced avocado on the toast, then pile on the spicy tuna mixture. Drizzle over the remaining sriracha, sprinkle over the sesame seeds and scatter with the spring onion greens to serve.