Trim the ends off Brussels sprouts and remove any damaged outer leaves. Slice them thinly using a sharp knife or a food processor with the slicing blade.
Heat a large skillet over medium-high heat and add the butter, allowing it to melt and begin to sizzle.
Add the shredded Brussels sprouts to the hot pan and spread them out in an even layer. Let them cook without stirring for 2-3 minutes to develop golden brown edges.
Stir in the minced garlic, salt, and pepper, then continue cooking for another 4-5 minutes, stirring occasionally, until the sprouts are tender and caramelized in spots.
Remove from heat and drizzle with fresh lemon juice. Toss to combine.
Sprinkle with Parmesan cheese and serve immediately while hot and crispy.