What’s a good sauce for quail????

I personally would do a roasted shallot white wine sauce....Or a Huckleberry port reduction.

Maybe a Cumberland sauce: https://www.deliaonline.com/recipes/international/european/british/cumberland-sauce

Hi! Agree with Nancy that something fruity sounds nice. I bet this bluberry-port sauce would be great: https://food52.com/recipes/81775-duck-breast-recipe

Aren't you lucky to have these to cook!
Most sauces for quail have some kind of fruit and/or sweetener.
Two to recommend are
• the classic French fig and Madeira sauce (from cailles en sarcophage)....recipes all over the place from new York times to you tube.
• red wine and dried cherry sauce from ricardocuisine.com (Ricardo is a respected and beloved Canadian cookbook author, blogger and TV teacher(.