1Heat coals or gas grill for direct heat. In large bowl, mix zucchini, summer squash, pattypan squash and dressing. Place mixture in grill basket (grill “wok”). Reserve dressing in bowl.
2Cover and grill squash over medium heat 10 to 13 minutes, shaking basket or stirring squash occasionally, until crisp-tender. Return squash to bowl with dressing. Add tomatoes and cilantro; toss to coat.