My Big Fat Greek Salad
If you need to make this the day before, I suggest making the dressing separately, and then mixing everything before the event. I think this should only be dressed about 30 to 60 minutes before service for maximum enjoyment, but that's just my approach, and some folks prefer an overnight marination.
Use 1/2 teaspoon dried oregano if you don't have the fresh kind.
Between 4 and 6 ounces of feta cheese work well here.