In a large saute pan, cook the bacon over medium heat until crispy. Remove the bacon and place on a paper towel lined plate. Leave the grease in the pan and set aside. You'll need 2 tablespoons of oil to saute the sprouts, so depending on how much grease the bacon rendered, you may need to add a bit more oil to the pan or (gasp) remove some of the excess grease.
In a food processor, place the slicing grater. Add the Brussels sprouts and let the machine do its job. In just a few seconds, the sprouts will be sliced and ready.
Then over medium-high heat, reheat the pan with the grease and when the oil is hot, add the sprouts. Stir well to combine with the grease and sprinkle with kosher salt and freshly ground black pepper.
The sprouts will turn bright green as they are cooking. It will take about 3-5 minutes for them to saute. Add the lemon juice, stir well and add the cheese stirring to thoroughly combine.
Drizzle with a little more extra virgin olive oil and taste. Adjust the seasoning if needed, adding more lemon juice, salt or cheese to your liking. Grind a bit more black pepper, grate a bit more cheese, crumble with bacon, if using, and serve.