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Tags and nutritional info are auto-generated and may be inaccurate. Always check the full ingredient list before cooking.
Peel the potatoes and slice them thinly and evenly, or into half-moons.
Peel the onion and slice it thinly into half-moons.
Place the potatoes and onion in a bowl and season with salt.
Heat the oil in a frying pan and cook the potatoes and onion until tender. Remove them with a slotted spoon and place them in a strainer to drain off any excess oil.
Place the stale bread in a bowl, cover with water and leave it to soak for a few minutes.
Drain the soaked bread well, then place it in a blender. Add a little water and blend until smooth and liquid, with a consistency similar to beaten eggs.
Pour the blended bread mixture over the cooked potatoes and onion. Mix gently until everything is well combined.
Heat a small frying pan and add a splash of olive oil. Pour in the mixture and cook until the bottom starts to set.
Place a plate slightly larger than the pan over the top and carefully turn the tortilla over. Slide it back into the pan and cook the other side until set and golden.
Turn the tortilla again if needed until it is cooked through and has a lovely golden colour on both sides.
Serve a slice on its own, with a fresh salad or even in a delicious Spanish omelette sandwich.
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Use less oil by boiling the potatoes until tender first, then finish them in a frying pan with a little olive oil.
Soaking and blending stale bread creates the soft base that makes this tortilla so delicious.
Use leftover boiled or roasted potatoes from another meal to save time.
Add leftover courgette, bell pepper or vegan chorizo to the mixture for variety.
Use a plate slightly larger than the frying pan to confidently flip the tortilla.
Let the tortilla rest for a few minutes before slicing to allow it to firm up slightly.
Store leftovers in an airtight container in the fridge and enjoy within 2–3 days.
Can I make the tortilla without onion?
Yes, you can leave out the onion if you prefer the potatoes to take center stage.
How do I flip the tortilla without breaking it?
Use a plate slightly larger than the frying pan, hold it firmly against the pan, and turn confidently.
Can I use fresh bread instead of stale bread?
Stale bread is recommended as it absorbs water better, creating the desired texture.
How should I store leftovers?
Keep leftovers in an airtight container in the fridge and enjoy within 2–3 days.
Can I add other vegetables to the tortilla?
Yes, you can add leftover courgette, bell pepper, or vegan chorizo to the mixture.
👵🌿 Welcome to Grandma Sita's kitchen. Grandma Sita comes from Galicia, in north-west Spain, a land where food, family and tradition have always gone hand in hand. Inspired by grandmothers around the world, we celebrate traditional recipes, seasonal ingredients, local produce and the wisdom passed from one generation to the next. Here you'll find comforting dishes, forgotten flavours and recipes rooted in sustainability—because cooking with care is one of the best ways to look after ourselves and the planet. More than a recipe collection, this is a place to preserve culinary heritage, celebrate food culture and keep family traditions alive, one dish at a time. Cook slowly. Waste less. Share generously. 💚
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