Can dressing sit at room temp for 2 or 3 hours before its cooked?

YES. Store-bought dressings often contain preservatives that make them shelf-stable, meaning that they can be safely kept at room temperature for short periods of time.

Unopened dressings can generally be left at room temperature for __2-3 days__.

Opened dressings should be refrigerated and used within __1-2 months__, according to the "best by" date on the packaging.