In a medium skillet, heat olive oil.
Add the corn and stir occasionally until kernels are slightly charred (about 10 minutes).
Allow to cool.
In a small bowl prepare the creamy dressing. Whisk together the mayo, garlic, cayenne pepper, lime juice, salt and pepper. Set aside.
Place the avocado in a small bowl and drizzle with a tablespoon fresh lime juice.
Transfer the cooled corn kernels to a large mixing bowl.
Add the jalapeño, tomatoes, onion, beans, half of the Feta cheese and cilantro.
Pour the dressing over the mixture and combine.
Gently add in the diced avocado.
Top with remaining Feta cheese.
Serve with tortilla chips.