Popovers with Wild Mushroom Sauce

Whisk together the milk, eggs, and melted butter in a medium bowl; set aside. Whisk together the flour and salt in a separate medium bowl. Pour the milk mixture into the flour mixture; whisk until blended. Cover; let the batter stand 1 hour.

Preheat the oven to 450°F. Put 2 teaspoons of the oil into each cup of 2 standard 6-cup popover pans or a large (each cup having a 1-cup capacity) 12-cup muffin tin. Place the pans on a rimmed baking sheet. Transfer to the oven; heat the oil in the pans 20 minutes.

Pour the batter into the popover cups, filling each two-thirds full. Bake (do not open the oven while popovers cook) 15 minutes. Reduce the oven temperature to 350°F; continue to bake the popovers until well browned and crusty, about 20 minutes more. Invert the popovers to unmold. Transfer to a bowl lined with a clean kitchen towel; cover to keep warm.