Other than mashed potato, "cabe rawit", spring onion, shrimp, peeled corn, or mashed tofu fritters are also common as perkedel ingredients.
en.wikipedia.org The ingredients include lemongrass, lime leaves, chili peppers, spring onion, shallots, either sauted with meat or wrapped around fish and grilled covered in banana leaves.
en.wikipedia.org Thinly slice the white and light-green parts of the spring onion and sprinkle over the top.
www.abc.net.au It is also common to cook meatballs in tomato sauce, and finely chopped spring onion and peppers are added before serving.
en.wikipedia.org