For extra crispy potato cakes, ensure the skillet is hot before adding the potato mixture and avoid overcrowding the pan. Feel free to experiment with different cheeses! Gruyere or sharp cheddar would be delicious alternatives to Parmesan. If you don't have ham steak, thick-cut bacon or sausage patties work wonderfully as a substitute. A squeeze of fresh lime juice over the avocado adds a bright, tangy note to the dish.