1. Mince garlic and place in gallon Ziplock
2. Slice mushroom and place in Ziplock with garlic
3. Pour 1/2 of the Dressing in with the mushrooms and garlic
4. Add thinly sliced red onion
5. Marinade all of the above for up to 24 hours, turning once and a while
6. In a large salad bowl, place all the rest of the ingredients
7. Add marinated mushroom mixture
8. Add balance of the Italian Dressing and toss well
9. Let stand for 1/2 hour before serving
10. Plate and sprinkle grated parmesano reggiano over top to serve