Cut tenderloin crosswise into 1-inch pieces. Flatten each piece slightly with
heel of hand.
Heat 1 tablespoon butter in large skillet over medium-high heat. Brown medallions,
about 2 minutes on each side. Add remaining ingredients to skillet with remaining
tablespoon of butter. Cover and simmer for 3 to 4 minutes.
Remove medallions to serving platter. Spoon sauce over.