2 portobello mushroom caps, stems and gills removed
3/4 cup prepared dressing, or enough to fill both (leftover stuffing/dressing works wonderfully)
1/4 cup shredded cheese (I love using a colby cheddar mix), plus more for topping
1 green onion, diced
2 tablespoons olive oil
3 tablespoon balsamic vinegar (optional, but recommended)
Salt, pepper, and poultry seasoning, if desired
Preheat oven to 350F.
Combine stuffing and cheese in a small bowl. Add additional seasoning if needed. Keep in mind that the cheese will add additional salt as it melts.
Brush the tops (curved side) of mushrooms with olive oil and place in a baking dish, top side down. Lightly brush the bottom edges the cap (now facing up) with the oil.
Fill the caps with the stuffing and cheese mixture, and drizzle with balsamic vinegar. Sprinkle with remaining cheese.
Bake uncovered for 10-12 minutes until mushroom is tender.