The primary ingredient in traditional paella is rice, specifically a short-grain variety known as Bomba or Calasparra rice. Paella is a Spanish dish that originated in the Valencia region and typically combines rice with a variety of ingredients, which can include seafood, chicken, rabbit, vegetables, and saffron, the latter being crucial for its distinctive yellow color. Traditionally cooked in a wide, shallow pan over an open flame, the dish is renowned for its unique flavors and textures. Each region in Spain has its own version of paella, reflecting local ingredients and culinary traditions.