1. Preheat oven to 425 degrees. Spread radicchio on half of a rimmed baking sheet and mushrooms on other half. Drizzle with oil; season with salt and pepper. Roast until barely tender, 10 to 12 minutes.

2. Lightly dredge pork in flour. Heat a large straight-sided skillet over medium-high heat. Swirl in oil and cook sage until just crisp, 1 minute. Remove from skillet. Swirl butter into skillet and cook pork in 2 batches until lightly browned around edges, 1 to 2 minutes on each side. Return all pork to skillet. Pour in wine and simmer until reduced to a glaze, about 1 minute. Add radicchio and mushrooms, coat with sauce, and serve