You can use any loaf of good French or Italian bread for this. My grocery store's bakery makes a great multi-grain, whole wheat loaf and that's what I use most of the time.
In a large mixing bowl, combine the cheese, mayonnaise, Italian seasoning, green onions, Parmesan cheese, parsley, salt, and pepper. Mix until thoroughly combined.
Just a word about the cheese - please don't use the pre-grated stuff. Take a minute or two to grate it yourself. The results are so worth the extra time!