These Stuffed Portobellos are always a crowd-pleaser on Thanksgiving. Not only do they come together quickly, they can act as either a main dish or a side. Vegan Stuffed Portobello Mushrooms Author: Dianne Wenz Serves: 4 servings Ingredients 4 large portobello mushrooms, stems removed 4 teaspoons olive oil, divided 2 teaspoons balsamic vinegar 2 medium-sized