Sweet Potato Hash Stuffed Portobello Mushrooms

Preheat oven to 425°F.

Remove stems from mushrooms. Set the caps aside and chop the stems.

Lightly brush the mushroom caps with 1 tablespoon oil. Sprinkle with 1/4 teaspoon salt and 1/4 teaspoon pepper. Place on a rimmed baking sheet and roast until soft, 10 to 15 minutes. Keep warm.

Meanwhile, heat 1 tablespoon oil in a large skillet over medium heat. Add sweet potato and water. Cover and cook, stirring occasionally, until just cooked through, 6 to 8 minutes. Uncover and stir in the remaining 1 tablespoon oil, the chopped mushroom stems, apple, bell pepper, shallots, poultry seasoning and the remaining 1/2 teaspoon salt and 1/4 teaspoon pepper. Cook, stirring, until soft, about 5 minutes. Stir in walnuts and parsley. Fill each mushroom cap with about 1 cup filling.