For extra depth of flavor, consider adding a splash of apple cider vinegar or balsamic glaze during the last minute of cooking. If you don't have fresh thyme, 1 teaspoon of dried thyme can be substituted. To make this dish vegetarian, omit the bacon and use olive oil or butter instead. The brussels sprouts can be sliced 1-2 days in advance and stored in an airtight container in the refrigerator.