If using proscuitto, lay very thin slices on baking sheet in a single layer and bake at 350 degrees for 10 minutes, watching so it doesn't burn.
To toast walnuts, place on baking sheet in a single layer and bake at 350 degrees for 5-10 minutes, watching so they don't burn.
Toss lettuces, apples, walnuts, cranberries, gorgonzola cheese and proscuitto.
To prepare dressing, combine anchovy paste, vinegar, water, oregano, salt, pepper, garlic, sugar, cornstarch, and 1/4 cup parmesan cheese into blender (or use an emulsion blender). Mix in blender; slowly adding 1 cup oil. Refrigerate until ready to use.