Preheat your grill to medium-high heat.
Slice the sweet potato into 1/2-inch thick rounds and trim the woody ends off the asparagus.
In a small bowl, whisk together the Dijon mustard, honey, apple cider vinegar, and garlic powder to create the glaze.
Lightly coat the chicken breast, sweet potato rounds, and asparagus with olive oil, sea salt, and black pepper.
Place the sweet potato rounds on the grill first, cooking for about 4-5 minutes per side until tender and lightly charred.
Add the chicken breast to the grill, cooking for 6-7 minutes per side or until the internal temperature reaches 165°F.
During the last 3 minutes of cooking, brush the honey-mustard glaze generously onto the chicken and add the asparagus to the grill.
Remove everything from the grill and let the chicken rest for 5 minutes before serving to ensure it stays juicy.