Spanish GARLIC Sweet Potatoes | Boniatos al Ajillo

Ingredients

• 700 gsweet potatoes, peeled
• 240 mlextra virgin olive oil
• 8 clovesgarlic
• 5 gchopped parsley
• 30 mlextra virgin olive oil
• to tastesea salt and black pepper

Instructions

1. 1

   Heat the oil

   Set a large frying pan over a medium heat and pour in 240 ml of olive oil.

2. 2

   Slice and rinse

   While the oil heats, cut the sweet potatoes into rounds about 0.625 cm thick. Put them in a large bowl and rinse under cold water for about 1 minute, or until the water runs clear. Transfer them to a tea towel and pat completely dry.

3. 3

   Fry the potatoes

   When the oil is hot, carefully add the sweet potato slices and turn them so they are coated. Stir every 2 to 3 minutes so they cook evenly.

4. 4

   Make the sauce

   Meanwhile, put 2 roughly chopped garlic cloves, the parsley and a pinch of salt in a mortar. Pound with a pestle until well mashed, then add 30 ml of olive oil and mix.

5. 5

   Check for tenderness

   After 20 to 25 minutes, when the sweet potatoes are lightly golden and cooked through, carefully lift them out of the pan. Check doneness with a toothpick if needed, then set them aside.

6. 6

   Strain the oil

   Pour the oil from the pan through a fine sieve into a heatproof bowl. This strains it so it can be used in future recipes.

7. 7

   Sauté the garlic

   Set the same pan over a medium heat and add 30 ml of the strained oil. Immediately add the 6 roughly chopped garlic cloves and stir continuously.

8. 8

   Season and combine

   After 1 to 2 minutes, once the garlic is lightly sautéed, carefully return the sweet potatoes to the pan. Season with salt and pepper, then gently toss together.

9. 9

   Finish and serve

   Transfer the sweet potatoes to a large serving dish and spoon the garlic and parsley sauce over the top.

What are Spanish garlic sweet potatoes?

Boniatos al ajillo means sweet potatoes with garlic, in the Spanish style of cooking an ingredient with plenty of garlic. This version fries the rounds in olive oil, then adds a fresh, pounded garlic and parsley sauce.

The method keeps the ingredient list simple while building flavour in two stages: first through the oil, then through the garlic and herb finish.

Nutrition and macros by portion

The nutrition label shows one serving as written: 457 calories, 3g protein, 36g carbs, 34g fat.

The sweet potatoes provide most of the carbohydrates, while the olive oil accounts for most of the fat. There is little protein in the dish, so balance a serving with a protein-rich main such as beans, eggs or fish, alongside vegetables.

Why cut the potatoes into rounds?

Even slices: Cutting the sweet potatoes about 0.625 cm thick helps them cook at a similar rate and makes them easy to turn in the pan.

Rinsing and drying: Rinsing until the water runs clear removes surface starch. Pat the slices thoroughly dry before they go into hot oil to reduce splattering.

Frying gently

Steady heat: A medium setting gives the slices time to soften while they become lightly golden. Stir every 2 to 3 minutes so they cook evenly rather than catching in one spot.

Room in the pan: Add the slices carefully and avoid packing them in too tightly; if they do not fit comfortably, fry them in batches.

Making the garlic sauce

Mortar and pestle: Pound 2 garlic cloves with the parsley and a pinch of salt until mashed, then stir in the measured olive oil. Crushing the ingredients gives the sauce a more integrated texture than simply scattering them over the dish.

Pan-fried garlic: The remaining 6 cloves go into the strained oil briefly. Keep stirring and take them off the heat as soon as they are lightly sautéed, before they turn dark.

How to tell when they are ready

Colour: Look for lightly golden edges rather than deep browning. The rounds should be tender inside, which you can check by piercing one with a toothpick.

Timing: The recipe allows 20 to 25 minutes for frying, but slice thickness and the pan can affect how quickly the potatoes soften. Use the tenderness cue as well as the clock.

What to serve alongside

These sweet potatoes work as a side for grilled fish, roast chicken, eggs or beans. Their rich, garlicky oil also pairs well with a crisp green salad or simply cooked vegetables.

Serve them warm so the sauce coats the slices easily, and offer bread if you would like something to mop up the olive oil.

Recipe notes & tips

• Dry the rinsed slices thoroughly before adding them to hot oil.
• Keep the potato rounds close to an even thickness so they finish cooking together.
• Stir gently to avoid breaking the softened slices.
• Strain the frying oil into a heatproof bowl, not a plastic container.
• Watch the garlic closely; it needs only 1 to 2 minutes to become lightly sautéed.
• Taste before serving and adjust the salt and pepper if needed.

Variations

• Add smoked paprika: Sprinkle a little over the potatoes with the salt and pepper.
• Use fresh herbs: Replace some of the parsley with chopped coriander for a different herbal note.
• Add chilli: Mix a pinch of chilli flakes into the garlic and parsley sauce.
• Finish with lemon: Add a small squeeze of lemon juice to brighten the sauce.
• Serve with eggs: Top a portion with a fried or poached egg for a more substantial plate.

Common mistakes to avoid

• Wet potato slices: They can make hot oil splatter, so pat them completely dry first.
• Uneven rounds: Thick and thin slices finish at different times; aim for about 0.625 cm throughout.
• Oil too hot: The outside may brown before the centres soften; keep the pan at medium heat.
• Garlic left unattended: It can darken quickly, so stir continuously and remove it while lightly sautéed.
• Rough tossing: Soft slices can break apart; turn them gently with a spatula.

How to store

Cool leftovers promptly, place them in an airtight container and refrigerate for up to 3 days. Reheat gently in a frying pan until hot throughout; the potatoes will be softer than when freshly cooked.

Frequently asked questions