Combine the salad ingredients. In a large salad bowl, combine the corn kernels, sliced cucumbers, tomatoes, cubed avocados, and red onions. Set aside.
Make the lime cumin vinaigrette. In a mixing bowl, whisk together the olive oil, lime juice, lemon juice, garlic, cumin, chili powder, salt, and pepper; whisk until well combined.
Combine. Pour the dressing over the salad; toss gently to combine.
Refrigerate. Cover the salad bowl with plastic wrap and set it in the fridge for one hour.
Finish and serve. Remove the corn salad from the fridge, stir, garnish with cilantro, and serve.
Notes
Corn: If fresh corn off the cob is not available, use 3 to 4 cups frozen (thawed) sweet corn kernels. You may also use canned corn - rinse it well.
To prep ahead, add avocado and dressing just before serving.
Add jalapeno or red pepper flakes for heat. For variety, consider other add-ins like bell peppers, black beans, or mango.