The typical flavorings for this dish are cheese and parsley, but you'll find some with other ingredients like green onion, spinach, or prosciutto. We have made this dish a variety of ways, including mixed with crumbled bacon, onion and hot peppers. As long as the moisture content of what you add to froga tat-tarja isn't too hight, you should be able to mix in whatever you like. Although vermicelli is the traditional pasta used to make froga tat-tarja, you can also make a spaghetti omelette if that is the type of pasta you have handy.