Combine hash browns, olive oil, salt, pepper and 1 cup cheddar cheese in a large bowl.
Spray muffin pan with cooking spray and start to shape the hash brown mixture into each pan, creating a "nest" for each one.
Bake nests until the edges start to turn brown and cheese is melted, around 15 minutes or so. Remove from oven and set temperature to 350 degrees.
Add one sausage patty into each nest, then crack on top of each patty, sprinkle 1 tbsp of cheddar cheese and parsley. Bake until eggs have set, around 15 minutes or so.