To improve the crust and add some moisture to the hash, toward the end of the cooking add 2-3 tablespoons of heavy cream. Mix the hash around a little bit so the cream gets down to the bottom of the hash and let it brown. If you want to serve it as a solid structure, invert it onto a plate from the frying pan. You can then cut it in pieces for serving.
Some people also will add a beaten egg and a little bit of flour to the hash before cooking. That will help to create the "pancake" style hash you sometimes get in diners so if you like it that way, give it a try. Figure 1 egg and 1 tablespoon of flour to 2-3 cups of hash. And as always, serve it with the eggs on top!