Step 1

Make dressing by whisking all ingredients together in a medium bowl until thoroughly incorporated, or shaking them in a jar with a tight-fitting lid. Set aside.

Step 2

Place the corn in a very large bowl. Add the tomatoes, jalapeños, cotija cheese, and cilantro to the bowl. Pour the dressing over the top and gently mix all of the ingredients with a large spoon until well combined. Refrigerate for several hours to allow the flavors to blend. Just before serving, gently stir in the diced avocado.