Tostadas de Atún con Aguacate (Tuna Ceviche Tostadas)
Little cubes of tuna cured in lime on crisp tostadas with a spoon of creamy avocado salsa and a few rings of chilli.
Made with Creamy avocado salsa and Tostadas and totopos (tortilla chips) and Ceviche lime marinade. Make a batch of the base first, then this takes minutes. Skip to the method
- Time35 min
- LevelMedium
- Costabout £2.14 a head
Cost is worked out from Aldi and Tesco shelf prices in October 2026. Your shop and brands will differ.
Ingredients
Tick what you need to buy. It goes on your shopping list.
Method
- 1
Make your ceviche lime marinade, creamy avocado salsa and tostadas (see the base recipes) beforehand and chill the marinade and salsa.
- 2
Cut the tuna into 1 cm cubes and put them in a cold glass bowl. Pour over 150 ml of the ready made ceviche lime marinade and stir gently.
- 3
Chill for 8 to 10 minutes, until the outside turns paler but the middle stays pink.
9 min - 4
Lift the tuna from the marinade with a slotted spoon and drain well. Toss with the red onion and a pinch of salt.
- 5
Spread 2 tbsp of your creamy avocado salsa (see the base recipe) on each tostada, then top with the tuna.
- 6
Finish with radish, chilli rings and coriander leaves and serve at once.
Tips
- Buy tuna labelled sushi grade or suitable for eating raw and keep it very cold until you slice it. Raw tuna should be previously frozen at -20C for at least 24 hours.
- Marinate the tuna for 8 to 10 minutes only. A pink centre tastes better than a pale one.
- Build the tostadas right before serving. Wet toppings soften a tostada within a couple of minutes.
- Radish or cucumber slices give a nice crunch if you want something extra on top.
Storing and freezing
Make these straight away and eat within 30 minutes. They do not keep, so throw away any leftover tuna and marinade.
Questions
Can I use tinned tuna?
Not for this dish, which depends on firm, fresh raw tuna cured in lime. For a cooked version, use flaked seared tuna with a spoonful of marinade instead.
Why is the avocado salsa spread under the tuna?
It makes a barrier that stops lime juice running into the tostada, and the creamy base balances the acid and chilli of the tuna.
Are these gluten free?
Yes, if the tostadas are made only from corn and nothing else has wheat in it. They are also dairy free, egg free and nut free.
More made with creamy avocado salsa
Tostadas de Setas Pibil (Mushroom Pibil Tostadas)
GFDFEFFlautas de Frijol y Queso (Crispy Rolled Bean and Cheese Taquitos)
GFEFNFCamotes Asados al Adobo con Salsa de Aguacate (Adobo Sweet Potatoes)
GFDFEFTacos de Berenjena Asada Sazonada (Spiced Roast Aubergine Tacos)
GFDFEFDouble check before you cook. Recipes can contain mistakes. Any diet labels come from the ingredients as written in this recipe and are a guide, not a guarantee. Always check every ingredient and the packet label for allergens and cross contamination, and ask your doctor or dietitian what is right for you, especially with coeliac disease, diabetes or a serious allergy. This is not medical advice.