Authenic Hungarian Goulash has stew meat (beef), potatoes, onions, paprika (peppers), salt, pepper, oil and dumplings. The dumplings are made from flour, salt and an egg.
Goulash typically consists of beef (though sometimes the meat can be lamb or pork), onion, paprika, sometimes garlic, and a number of other vegetables. The other vegetables vary, but they may include tomato and peppers.