The "Mix" that this recipe calls for is entirely up to you. What do you like with your Bacon & Eggs? You can mix it up add some spices or keep it traditional. Maybe go Greek with some Feta cheese? A scoop of Ricotta on top would do quite nicely as well.
The beauty of this recipe is that you can make plenty of variations of it until you find the one that knocks people on their asses.
Experiment and Enjoy!