- Preheat broiler to high with a rack in middle of oven
- Microwave potatoes, covered until heated through, 3-4 minutes. Stir in cream and parmesan. Cover ; set aside
- Heat oil in a cast iron skillet over medium high heat. Cook mushrooms, stirring occasionally until softened and liquid has mostly evaporated, about 10 minutes. Add onion, carrots, rosemary, slat and pepper; cook, stirring often, until onions and carrots are tender, about 10 minutes. Stir in garlic cook 30 seconds. Add wine and cook until completely evaporated, about 3 minutes. Sprinkle vegetables with flour; cook, stir constantly, 1 minute. Still stirring gradually add broth. Cook, stirring often until thickened 5-6 minutes.
- Remove skillet from heat. Spread mashed potatoes over vegetables to completely cover them. Broil until lightly browned, 3-4 minutes, sprinkle with parsley.
- 327 calories Serves 4-6