2. Heat butter in skillet. Brown meat on both sides. Remove to heavy casserole with cover as they are done.

3. Add mushrooms to pan. Cook until browned over medium heat. Pour over meat in casserole.

4. Add broth to skillet and scrap up brownings. Pour over meat.

5. Pour tomatoes over pork. Cover.

6. Bake at 300 degrees for 1 hour. check for tenderness. Return to oven for another 1/2 hour, if necessary.

7. Drain juices from meat. Mix 1/2 cup juices with remaining 1/4 cup flour. Stir until smooth. Mix with remaining juices, heat to boiling. Cook until thickened.

8. Add sour cream. Pour over meat. Serve immediately.