Toss the Brussels Sprouts in olive oil making sure they're fully coated but not too oily, add all your seasoning along with your garlic and finely chopped shallots. Make sure your cast iron is very hot and pour the ingredients the sprouts will cook up in about 15 minutes.  While the sprouts are still hot drizzle some balsamic glaze over them.

Tip:  I didn't do it  the first time but if you cut your sprouts in half it'll help with the cook time and also create a crunchier texture.