Whisk Dijon mustard, honey and olive oil. Pour 3/4 of it over chicken breast and marinate for 30 minutes to 1 hr.
Optional: Toss sweet potato wedges and zucchini in 1 tsp olive oil and Flavor God Garlic Lover's Seasoning.
Grill chicken, sweet potato wedges and zucchini over medium-high heat until cooked through (mine took about 10 minutes total and I added the sweet potatoes while the grill was heating up). Move zucchini and sweet potatoes to top rack if needed to keep from burning.