2Melt butter in a large skillet over medium heat; add shallots and sauté until translucent, 5 to 8 minutes. Stir in mushrooms, salt, and black pepper; increase heat to medium-high and cook, stirring often, until mushrooms are golden brown, about 10 minutes. Pour wine into the pan and bring to a boil while scraping the browned bits of food off the bottom of the pan with a wooden spoon; bring to a simmer.
3Gently place scallops into wine and poach in the mushroom mixture until barely firm, about 2 minutes per side; transfer scallops to a bowl. Strain mushroom mixture into another bowl, reserving mushrooms and cooking liquid separately.
