01 - Preheat a grill or grill pan over medium-high heat. Lightly brush each ear of corn with olive oil.
02 - Place corn on the grill and cook, turning every 2 to 3 minutes, until charred in spots and kernels are tender, 8 to 10 minutes total. Remove from heat and let cool slightly. Stand each cob upright and slice the kernels off cleanly into a bowl.
03 - In a large bowl, combine the charred corn kernels, diced avocado, diced pineapple, diced mango, chopped red onion, halved cherry tomatoes, and chopped cilantro. Toss gently to distribute.
04 - In a small bowl, whisk together the olive oil, lime juice, minced garlic, honey or agave syrup, ground cumin, salt, and black pepper until fully emulsified and well blended.
05 - Pour the lime dressing over the salad mixture and gently toss until all ingredients are evenly coated, taking care not to mash the avocado.
06 - Scatter sliced jalapeño and crumbled feta cheese over the top if desired for added heat and tang.
07 - Serve immediately at room temperature, or chill for 10 to 15 minutes for a more refreshing presentation. Best enjoyed fresh.