Trim the ends off of the zucchini. Cut each in half lengthwise, then each half lengthwise into thirds.
In a resealable plastic bag, combine the olive oil, vinegar, thyme, salt, and pepper. Add the zucchini spears and toss to coat well. Let sit until ready to cook
When ready to cook, set the Traeger temperature to 350°F and preheat with the lid closed for 15 minutes.
Remove the zucchini from the marinade and place directly on the grill grate, cut-side down. Close the lid and cook until grill marks appear and zucchini is tender, 3-4 minutes per side.
Remove the zucchini from the grill and garnish with more thyme, if desired. Enjoy!
