Calçotada

My wife and I have come home after a week-long trip. The first weekend of March we met with our childhood friends since 20 years. We do a calçotada.
The "caçotada" is a typical gastronomic party of Tarragona. The "calçots" are a variety of onions, they are roasted in the coals and they eaten with the hands with a sauce of almonds.
After the weekend, I helped a friend to place the wood floor in the attic of his house.

My wife and I have returned home after a week-long trip. During the first weekend of March, we visited our childhood friends whom ("whom" used because "friends" are objects in the sentence) we have known for twenty (write out numbers for more formal writing) years. We participated in a "calcotada", a typical/traditional gastronomic party held in the region of Tarragona. The "calcot" is a variety of onion which is roasted over coals, served with an almond sauce and eaten with the hands. After the weekend, I helped a friend lay the wood/wooden ("wood" is an attributive noun and "wooden" is an adjective - both are correct)) floor in the attic of his house.

Great job, Jose Antonio! Hope my comments help you. Sounds delicious! I enjoyed researching and learning more about the culture and traditions of this region of Spain.