Which cuisine is known for using saffron as a key ingredient?

Saffron is widely recognized as a key ingredient in Spanish cuisine, most notably featured in traditional dishes such as paella. This spice, derived from the flowers of the Crocus sativus plant, adds not only a unique flavor but also a vibrant golden hue to dishes. In addition to paella, saffron is used in various other Spanish dishes, highlighting its significance in Spain's culinary identity.

While saffron can also be found in Italian and Indian cuisines—such as in risottos or biryanis—it is the association with Spanish, particularly through its history and prevalence in iconic dishes, that makes it most identifiable with this cuisine. Mexican cuisine tends to rely on a different palette of spices and ingredients, and although it showcases a wide range of flavors, saffron is not a common feature.

Thus, the recognition of saffron in the context of Spanish cuisine positions it as the correct answer, underlining the cultural and historical importance of this spice in enhancing flavors and contributing to the country's culinary heritage.