Press each biscuit onto the bottom and up the sides of a greased muffin cup. In a large bowl, combine the ham, potatoes, 1/2 cup cheese, parsley and garlic powder.
Spoon 1/4 cup into each prepared cup. Sprinkle with remaining cheese. Bake at 350° for 20-25 minutes or until lightly browned. If desired, sprinkle with minced fresh parsley. Serve warm. Refrigerate leftovers.