- In a small pot over medium-high heat, combine vinegar and honey. Bring mixture to a boil, then reduce heat to medium-low and simmer until reduced by half. Remove from heat and let cool.
- Prepare a charcoal grill for medium-high heat. Brush sweet potato rounds with olive oil and season with salt and pepper. Grill sweet potatoes for 6 to 8 minutes per side, rotating them a quarter turn halfway through each side. Remove from grill, drizzle with balsamic glaze, and sprinkle with parsley.