Grill the CornBrush corn with olive oil and grill over medium-high heat for 8–10 minutes, turning occasionally, until lightly charred. Let cool slightly, then cut kernels off the cob.
Mix the DressingIn a large bowl, whisk together mayo, lime juice, chili powder, garlic powder, salt, and pepper.
Combine the SaladAdd corn kernels and halved tomatoes to the bowl. Toss gently to coat in the dressing.
Finish and ServeStir in chopped cilantro and cotija cheese. Taste and adjust seasoning. Serve warm or refrigerate until ready.