Learn Spanish (Latin America): Sazonados los champiñones, el sabor quedó riquísimo. - Once the mushrooms were seasoned, the flavor turned out extremely delicious.

This is an absolute participle clause, which is a sophisticated way to set the background for the main action. Starting with the participle Sazonados creates a shortcut meaning "Once seasoned" or "After being seasoned." It replaces a longer phrase like Una vez que los champiñones fueron sazonados. Remember that the participle must agree in gender and number with its noun, which is why it is masculine plural to match los champiñones.

Why is the word order Sazonados los champiñones instead of Los champiñones sazonados?

In these background clauses, the participle almost always comes before its subject. If you started with Los champiñones sazonados, it would just sound like a normal subject ("The seasoned mushrooms...") and the listener would be left waiting for a main verb. Putting Sazonados first immediately signals the "Once X was done..." background structure.

Why use quedó here instead of fue or estuvo?

While fue or estuvo would simply mean the flavor "was" delicious, the verb quedar is frequently used to describe the final result of a process or a change in state. In this context, it translates perfectly to "turned out" or "ended up," emphasizing that the great flavor was the direct result of the seasoning process.

Why does rico change spelling when it becomes riquísimo?