Generously butter the muffin tin. Then add about ΒΌ cup of the shredded hash browns into each compartment, pressing the potatoes down and up the sides.
Then place in the oven at 350 degrees to bake for 25-30 minutes, until the potatoes have browned slightly.
If you are making bacon, cook it in the oven alongside the potatoes until crisp.
Once the potatoes are slightly brown, remove them from the oven. Either place a slice of prosciutto or some crumbled bacon on top of the hash browns. Then add a bit of cheese. Add an egg, and top with a bit more cheese.
Bake for 11-13 minutes - until the white has fulled cooked, but while the yolk is still runny.