8 ounces whole-wheat egg noodles
1 tablespoon extra-virgin olive oil
1 medium onion, finely chopped
8 ounces mushrooms, sliced
1/2 teaspoon salt
1/2 cup dry white wine
6 tablespoons all-purpose flour
3 cups nonfat milk
1/2 teaspoon freshly ground pepper
12 ounces canned chunk light tuna drained (see Note)
1 cup frozen peas, thawed
1 cup finely grated Parmesan cheese, divided
1/2 cup coarse dry whole-wheat breadcrumbs (see Tip)