01 - Set a grill or grill pan over medium-high heat. Lightly brush the corn cobs with olive oil to prevent sticking and promote even charring.
02 - Place corn on the grill and cook, turning every couple of minutes, until charred in spots and kernels are tender, about 8 to 10 minutes. Remove from heat, let cool slightly, then stand each cob upright and slice the kernels from the cobs.
03 - In a large salad bowl, combine the charred corn kernels, diced avocado, pineapple, mango, finely chopped red onion, halved cherry tomatoes, and chopped cilantro.
04 - In a small bowl, whisk together the extra-virgin olive oil, fresh lime juice, minced garlic, honey or agave syrup, ground cumin, salt, and black pepper until the dressing is well emulsified.
05 - Pour the lime dressing over the salad and gently toss everything together, taking care not to mash the avocado.
06 - Scatter sliced jalapeño and crumbled feta cheese over the top if desired, adjusting the amount to your taste.
07 - Serve the salad immediately while the corn is still slightly warm, or chill briefly for a refreshing cold side dish.