In a small bowl, whisk together the yogurt, mayo, garlic, lime zest, lime juice, syrup, chili powder and salt until combined. Taste and adjust with salt or honey if needed.
Salad:
Slice your zucchini vertically into 4-6 long strips and then cut the strips in half. Lightly drizzle with olive oil and season with salt and dried oregano – toss until all is coated. Heat a large grill pan over medium-high heat. Once hot sear each side of the zucchini strips for 2-3 minutes per side. Transfer to a cutting board and slice into bite sized pieces.
In a large bowl, toss together the grilled zucchini, corn, pepper, avocado, Cotija cheese, cilantro, scallions and dressing until all is coated.