This fast and fresh vegetarian Shepherd’s Pie made with Portobello mushroom, carrots, peas, corn, and onions, all topped with leftover mashed potatoes.
Prepare Skinny Garlic Mashed Potatoes according to directions.
For the Vegetarian Shepherd's Pie: In a large sauté pan, heat the butter and oil. Add the mushrooms and ½ teaspoon salt, cook for 10 minutes, stirring occasionally.
Add the onion, carrots, parsley, thyme, ½ teaspoon salt and pepper and sauté 10 minutes.
Stir in garlic, cook for 30 seconds, then add the tomato paste, Worcestershire, remaining ¼ teaspoon salt and pepper.
Sprinkle vegetables with the flour, stir to coat and cook, scraping brown bits from the pan, 3-4 minutes.
Add the broth, peas and corn, cook, stirring often, until sauce has thickened (about 5 minutes).
To assemble the Mushroom Shepherd's Pie: Preheat broiler to high.
Transfer vegetables to an 8” x 11” casserole dish.
Spread mashed potatoes in an even layer over the vegetables, top with parmesan and broil 5 minutes, or until top is golden. Garnish with parsley.