"Jeg spiser utrolig storfekjøtt i Spania."

Translation: I eat incredible beef in Spain.

[NuggetPls]

Er Spania berømt for storfekjøtt?

[MaxMVP]

Akuratt! Denne fantastiske storfekjøtt!

[Dannyl17]

In the north.

[Panthera4]

Before or after corrida?

[ukeglider]

It's completely unrelated.
Bullfighting uses mature bulls, but the best flavours in grilled meat come from young cattle ('ternera' in spanish), while older cows are better for "guisos" ('broths' if i'm not mistaken)

Most acknowledged places for herding and growing cattle are in the north of Spain (Galicia, Asturias, Cantabria and Pais Vasco).