The Famous TUNA SANDWICH from the Basque Country | Bocadillo de Bonito
Spain is famously known for their bocadillos (sandwiches), and this tuna sandwich from the Basque Country, known as “bocadillo de bonito,” is no exception. It’s filled with flavors, super easy to make, and done within minutes with absolutely no cooking.

To make this sandwich, I used Spanish canned tuna in olive oil, known as bonito del norte. Which is all white tuna. Of course, you can use any type of canned tuna you like. Though using the Spanish one truly elevates the flavors of this sandwich.

As for the rest of the ingredients, you will need some canned anchovies in olive oil and some Spanish guindilla peppers, which are very similar to pepperoncini. I also made a simple garlic mayonnaise. Which brings it all together.

TIPS & TRICKS to Make this Recipe: I used a baguette to make the sandwiches. Which is what is typically used in Spain. You can use any bread you like. Just make sure it has a hard shell, and if not, lightly toast it. That way it doesn’t fall apart.

Key Ingredients & Cookware I used in this Recipe:
MY COOKWARE
MY CHEF´S KNIFE
EXTRA VIRGIN SPANISH OLIVE OIL (10% OFF Your Order with Coupon ONAFORK)
SPANISH CANNED TUNA (10% OFF Your Order with Coupon ONAFORK)
SPANISH GUINDILLA PEPPERS (10% OFF Your Order with Coupon ONAFORK)
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Watch the Video Below on How to Make this Tuna Sandwich from the Basque Country

Basque Tuna Sandwich | Bocadillo de Bonito
Ingredients
- 1 baguette
- 1/2 cup mayonnaise 120 grams
- 2 cloves garlic (finely grated)
- 1 tsp lemon juice 5 ml
- 1 tbsp extra virgin olive oil 15 ml
- 2 cans tuna in olive oil 4 oz / 110 grams each
- 1 can anchovies in olive oil 3 oz / 70 grams
- 9 Spanish guindilla peppers (similar to pepperchinis)
- sea salt & black pepper
- chopped chives for garnish
Instructions
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Add the mayonnaise into a bowl, along with the grated garlic, lemon juice, and olive oil, then season with salt & pepper, and whisk together
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Drain the cans of tuna into a fine sieve with a bowl underneath, gently flake the tuna
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Drain the can of anchovies, and cut the guindilla peppers into small bite-sized pieces
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Cut the baguette into 6-inch-long (15 cm) sandwiches, then cut each one in half lengthwise
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Spread the garlic mayo on both sides of the sandwich, then add some tuna over one slice, along with a couple of anchovies, some guindilla peppers, and top it off with chopped chives, enjoy!
Recipe Notes
Get the Spanish Tuna and Spanish Guindilla Peppers I used to make this Recipe (10% OFF Your Order from La Tienda with Coupon ONAFORK)
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Tony
So tasty, yet quick to make for lunch.
I must admit I cheated with the peppers – couldn’t get the correct Spanish ones at short notice, but I did have a jar of quality Cantabrian anchovies.
21 . Feb . 2026Spain on a Fork
Glad you enjoyed it! Thanks for the comment 🙂 Much love
21 . Feb . 2026