How to Make It
In a bowl, toss the chorizo and squid; season with salt. In a large skillet, heat 1/2 tablespoon of the oil. Add half of the squid mixture. Cook over high heat, stirring, until the squid is firm, 1 minute. Transfer to a plate. Add 1/4 cup of the water to the skillet and scrape up any browned bits in the pan. Pour the juices into a bowl. Repeat with the remaining squid and chorizo, using another 1/2 tablespoon of olive oil and the remaining 1/4 cup of water.
Heat the remaining 1 tablespoon of oil in the skillet. Add the garlic; cook over moderately high heat until soft. Add the tomato, chickpeas, vinegar and reserved pan juices and cook over moderate heat for 2 minutes. Return the squid mixture to the skillet; toss with the parsley and red pepper. Season with salt. Mound the arugula on plates, drizzle with oil and top with the squid.