Make the dressing: Combine the mint, cilantro, vinegar, 1 teaspoon of the honey, and salt and pepper to taste in a blender. Blend until smooth. With the motor running, slowly add the olive oil and blend until emulsified. Taste and add more honey, salt and pepper as desired. Set aside.
Heat a grill to medium high.
Brush the corn with some canola oil, then season with salt and pepper. Grill, covered, until lightly charred on all sides and tender, 2 to 4 minutes per side. Let cool slightly, then cut the corn kernels from the cobs and place them in a large bowl.
Add the scallions to the bowl and season with salt and pepper. Add some of the dressing and toss to coat. Transfer to a platter; top with the cheese, mint and another drizzle of the dressing. Serve immediately.