**Prepare the Brussels Sprouts:**
Trim the ends and remove any yellowed or damaged outer leaves. Slice each sprout in half lengthwise.
**Heat the Skillet:**
Heat olive oil or butter in a large skillet over medium heat until hot.
**Sauté the Brussels Sprouts:**
Add the halved Brussels sprouts to the skillet, cut side down. Let them cook undisturbed for 4-5 minutes until the cut sides are golden brown.
**Stir and Cook:**
Stir the sprouts, season with salt and pepper, and continue cooking for another 5-6 minutes, stirring occasionally, until they are crisp-tender.
**Add Garlic:**
Stir in the minced garlic and cook for 1-2 minutes until fragrant.
**Optional Enhancements:**
Drizzle with balsamic vinegar and toss to coat. Remove from heat and sprinkle with Parmesan cheese if desired.
**Serve:**
Transfer to a serving dish and serve warm.