We can buy hash browns in the supermarket. Here's the recipe. Ingredients: 400gm potatoes, peeled 1 small onion, grated (optional) 1 egg 1 tbs snipped fresh chives or parsley (optional) salt and pepper 2 tablespoons of oil Method: Preheat oven to 150°C. Place the potatoes in a large saucepan, bring to the boil and cook for 10 minutes. Drain well and set aside to cool. Pat dry with paper towel and coarsely grate into a large bowl (I use my food processor for this). Stir in onion (if using), egg, chives or parsley (if using) and season with salt and pepper. When combined, divide mixture into eight portions and shape into patties. Heat oil in a non-stick frying pan over medium heat. Add 2-3 hash browns to the pan and cook without turning for about 6 minutes or until golden and crispy on the bottom. Use a spatula to carefully turn the hash browns and cook until golden brown and crispy. Transfer cooked hash browns to a baking tray and keep warm in the oven while you cook the rest.

Here's a video http://www.youtube.com/watch?v=m8hA7L6v7zo

I don't know how to cook it, but the name is "hash browns" (not "harsh brown").