01 - Preheat a grill or grill pan over medium-high heat. Lightly brush the corn cobs with a thin layer of olive oil.
02 - Place corn on the grill, turning occasionally, until charred in spots and cooked through, about 8 to 10 minutes. Let cool slightly, then carefully slice the kernels off 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 thoroughly blended.
05 - Pour the lime dressing over the salad and gently toss to coat all ingredients evenly without mashing the avocado.
06 - Scatter sliced jalapeño and crumbled feta cheese over the top if desired for added heat and creaminess.
07 - Serve immediately at room temperature, or chill briefly for a more refreshing presentation.