When ready to cook, set your Z Grills pellet grill to 450 °F and preheat
Brush grill grate with oil.
Coat corn with nonstick spray; season with salt and black pepper. Grill corn, covered, until charred on all sides, 10–15 minutes.
Transfer the corn to a cutting board, cool slightly, then cut kernels off cobs.
In a bowl, whisk together lime zest, lime juice, olive oil, garlic, honey, and cumin for the vinaigrette; season with salt and black pepper.
Toss corn, sweet peppers, jalapeño, Cotija, and cilantro with vinaigrette; season with salt and black pepper.