Prepare one pound of fresh Brussels sprouts by cutting off the stems (the small, hard, white part at the bottom), and slice each sprout in half lengthwise.
Place the halves and any loose leaves in a single layer in a cast-iron skillet.
Drizzle olive oil over the top (about a tablespoon will do) and use clean hands to massage the oil into the sprouts until they’re fairly evenly coated.
Drizzle about a teaspoon of white vinegar over top. Then sprinkle on salt, pepper, and garlic powder to your taste preference.
Bake your sprouts on the center rack of your oven for about 20 minutes, using tongs or a spatula to toss them about once while cooking.
When the insides are lightly browned, and the loose leaves are crispy, you’re ready to serve!