In the same pan, add the white wine and reduce heat to MEDIUM. Scrape the bottom to loosen up the browned bits.
Add the quartered scallops with their juice along with a bay leaf.
Bring to a low boil for about 5 minutes. Divide the scallops among the 4 serving dishes evenly on top of the mushroom/onion mixture.
Pour off reserved liquid to a 2-cup measuring cup. Toss the bay leaf.