You don’t need to look for the most colorful root veggies at the farmers’ market to make this dish incredible, but it doesn’t hurt. You might be able to find unique radishes (which are incredibly sweet when roasted) or small salad turnips (which have none of the bitterness associated with their larger relatives).
Tip: If your root veggies are giving your soaked wooden skewers a tough time, microwave them for 2-3 minutes to make them easier to skewer.