Instructions
Step 1
Make the dressing: To a blender or small food processor, add the cilantro, lime juice, cumin, sugar, salt, pepper, garlic, and onion and pulse until smooth. With the machine running on low speed, slowly drizzle in the oil until fully incorporated. Transfer the dressing to a small bowl, cover, and refrigerate for up to 5 days.
Step 2
Make the salad: Heat a charcoal or gas grill to medium-high (about 400°F). Alternatively, heat a grill pan over high. Add the corn and cook, turning occasionally, until the husks darken and the kernels are lightly browned all over (peel back the husk to check), 10–15 minutes. Remove from the grill and set aside to cool to room temperature.
Step 3
Using a sharp knife, slice the corn kernels off each cob. Transfer the kernels to a large bowl (reserve the cobs for another use or discard). Add the cucumber, tomatoes, and onion and toss well to combine. Just before serving, add the corn flakes, cilantro, and mint and toss gently to combine without breaking up the corn flakes. Add ½ cup of the dressing (reserve any remaining for another use) and toss gently to coat. Season to taste with salt and serve immediately.