In a large bowl, combine 3 cups of corn kernels, 1 diced avocado, 1/4 cup of finely chopped red onion, 1/4 cup of chopped cilantro, 1 seeded and minced jalapeño, and 1/4 cup of crumbled feta cheese.
In a small bowl, whisk together the juice of 1 lime, 2 tablespoons of olive oil, salt, and pepper.
Pour the dressing over the salad and toss gently to combine.
Serve immediately or refrigerate until ready to serve.