Grilled Sweet Potatoes, Zucchini, and Yellow Squash with Pesto and Feta

Sweet potato, large

Pesto sauce

Teaspons za'atar seasoning

To 4 olive oil

Feta cheese crumbles

Large yellow squash (trimmed and chopped into ¼” rounds)

Large zucchini squash (trimmed and chopped into ¼” rounds)