Balsamic Roasted Green Beans and Mushrooms

Ingredients (6)

• 1 lb. green beans, ends trimmed
• 8-12 oz. sliced mushrooms
• 1 1/2 Tablespoons olive oil
• 2 Tablespoons good quality balsamic vinegar
• Salt and freshly ground black pepper, to taste
• Shredded Parmesan cheese, for sprinkling