Preheat the grill to medium-high heat. Side Note: You can also use a grill pan over medium-high heat.
Prepare the skewers by skewering the different vegetables on the wooden skewers alternating between the vegetables, keeping the larger veggies near the bottom of the skewer and the smaller veggies towards the top of the skewer.
Make the herb garlic butter while the skewers are on the grill by combining the melted butter, olive oil, minced garlic, parsley, cilantro, chives, sea salt, freshly cracked pepper, and crushed red pepper flakes, to taste; mix well; set aside until needed.
Grill the skewers dry for 20 minutes, rotating them every 3-5 minutes. For the final 5 minutes, baste the veggie skewers evenly with the herb garlic butter.
Remove the skewers from the heat and brush them again thoroughly with herb garlic butter and season well with sea salt and freshly cracked black pepper, to taste. Serve with some good balsamic vinegar drizzled on top, of desired. Enjoy.