Grilled Portabello Potato Topping
Ingredients
- 24 (8 to 12 oz. each) Washington Russet potatoes
- 4 lbs. Portabello mushrooms, fresh
- 1/3 cup olive oil
- 1/3 cup balsamic vinegar
- 1/8 teaspoon salt
- ¼ teaspoon pepper
- 2 tablespoons vegetable oil
- 1 lb. 12 oz. (1 qt.) onion, thinly sliced
- 1 lb. 8 oz. (1 qt.) green pepper, thinly sliced
- 2 lb. 2 oz. (1 qt.) tomatoes, diced
- 1 ½ cups dry white wine
- 2 teaspoons dried oregano, crushed
- 1 ½ teaspoon salt
- ½ teaspoon ground pepper
- ½ cup grated Parmesan cheese, optional