How to Make It
Preheat the grill to medium (350°F to 450°F). Brush the squash and the Halloumi with oil; season with salt and pepper. Grill, uncovered, until squash is tender and Halloumi has grill marks, 2 to 3 minutes on each side.
Stir together squash, Halloumi, and Summer Sauce in a medium bowl. Top with basil.