Add tomatoes to a colander or fine mesh sieve set over a plate, sprinkle salt all over (about ½ teaspoon), and use your hands to gently toss to mix. Let them sit for 5-10 minutes - this will help season and boost that tomato flavor.
Rub the corn with a little oil to coat, place on a hot grill or skillet and cook for about 5-7 minutes or until charred, turning every 2-3 minutes (see recipe note). Transfer to a cutting board to cool off, then slice the kernels off with a knife.
In a large bowl, whisk together the garlic, lime, oil, and salt. Add the tomatoes and feta and toss to coat.
Transfer the salad to your serving bowl or platter and top with the corn, tortilla chips, cilantro, and black pepper.