Season meat evenly with salt and pepper. Heat olive oil in a large skillet over medium-high heat. Add meat and brown on each side, about 1 – 2 minutes each side, but not past rare. Add rosemary, garlic, wine, balsamic vinegar and plum preserves. Remove meat after 1 minute and keep warm. Reduce liquid to a few tablespoons. Whisk in chilled butter until melted. Immediately remove pan from heat and stir in berries. Arrange medallions on plates, spoon sauce over and top with blue cheese crumbles.