4 ears sweet corn, unhusked
Kosher salt
1 clove garlic, minced
1 jalapeño pepper, seeds and ribs removed, minced
Zest and juice of 3 limes
1/2 cup extra-virgin olive oil
1 ripe avocado, halved, pitted, peeled and diced
1 cup halved cherry tomatoes
6 scallions, thinly sliced
3/4 cup finely chopped fresh cilantro leaves
Freshly ground black pepper