Receta Calçots al Horno: A Delicious Catalan Tradition

Calçots are a traditional Catalan delicacy that is enjoyed during the winter months. These long, green onions are typically grilled over an open flame and served with a delicious romesco sauce. However, if you don’t have access to a grill or simply prefer a different cooking method, you can also prepare calçots in the oven. In this article, we will explore the step-by-step process of making receta calçots al horno, along with some interesting facts about this beloved Catalan tradition.

The Origins of Calçots

Calçots have a rich history that dates back to the late 19th century in the region of Catalonia, Spain. They were first cultivated by a farmer named Xat de Benaiges, who accidentally discovered a new way of growing onions. Instead of planting the onions directly in the ground, he decided to cover them with soil, leaving only the green shoots exposed. This technique, known as “calçar” in Catalan, gave birth to the calçot.

Calçots are typically planted in the summer and harvested in the winter. They are grown in sandy soil, which helps to retain moisture and enhance their flavor. The process of growing calçots involves hilling up the soil around the base of the plants as they grow, which results in the long, white stems that are characteristic of calçots.

Preparing Calçots for the Oven

Before you can cook calçots in the oven, you need to prepare them properly. Here is a step-by-step guide:

  1. Start by trimming the roots and the green tops of the calçots, leaving about 2 inches of green stem.
  2. Remove any loose or damaged outer layers of the calçots.
  3. Wash the calçots thoroughly to remove any dirt or debris.
  4. Preheat your oven to 400°F (200°C).
  5. Place the calçots on a baking sheet lined with parchment paper.
  6. Drizzle the calçots with olive oil and sprinkle them with salt.
  7. Roast the calçots in the oven for about 20-25 minutes, or until they are tender and slightly charred.

Once the calçots are cooked, you can serve them with a traditional romesco sauce or any other sauce of your choice. The romesco sauce is made with roasted red peppers, tomatoes, almonds, garlic, olive oil, and vinegar. It adds a delicious and tangy flavor to the calçots.

Health Benefits of Calçots

Calçots not only taste delicious but also offer several health benefits. Here are some of the key nutrients found in calçots:

  • Vitamin C: Calçots are an excellent source of vitamin C, which is essential for a healthy immune system and collagen production.
  • Fiber: Calçots are rich in dietary fiber, which aids in digestion and helps to maintain a healthy weight.
  • Antioxidants: Calçots contain various antioxidants, such as quercetin and kaempferol, which help to reduce inflammation and protect against chronic diseases.
  • Minerals: Calçots are a good source of minerals like potassium and calcium, which are important for maintaining healthy bones and muscles.

By incorporating calçots into your diet, you can enjoy their delicious taste while also reaping the numerous health benefits they offer.

Frequently Asked Questions

1. Can I use regular onions instead of calçots?

No, calçots have a unique flavor and texture that cannot be replicated with regular onions. It is best to use calçots for an authentic and delicious experience.

2. Can I freeze calçots?

Yes, you can freeze calçots. However, it is recommended to blanch them in boiling water for a few minutes before freezing to preserve their flavor and texture.

3. Can I grill calçots instead of baking them in the oven?

Yes, grilling calçots is the traditional method of cooking them. It imparts a smoky flavor and charred texture that is highly sought after. However, baking them in the oven is a convenient alternative if you don’t have access to a grill.

4. Can I use the romesco sauce for other dishes?

Absolutely! The romesco sauce is incredibly versatile and can be used as a dip for vegetables, a spread for sandwiches, or a sauce for grilled meats and seafood.

5. Are calçots spicy?

No, calçots are not spicy. They have a mild and slightly sweet flavor that is similar to leeks or green onions.


Calçots al horno is a delicious Catalan dish that can be enjoyed during the winter months. These long, green onions are roasted in the oven until tender and slightly charred, and then served with a flavorful romesco sauce. Calçots have a rich history and offer several health benefits, including being a good source of vitamin C, fiber, antioxidants, and minerals. Whether you choose to grill or bake them, calçots are a must-try delicacy that will delight your taste buds and introduce you to the unique flavors of Catalonia.

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