I had an appetizer at California Pizza Kitchen that was pretty similar to this. We all loved it & I thought it would be really easy to make at home.
2 cups frozen sweet white corn
3/4 can black beans (drained & rinsed)
1 ripe avocado, diced small
1/3 onion, diced small
2 tomatos--I cut off the end, squeezed out the juice & seeds, then diced it small
Juice from 1 lime
Small palmful fresh cilantro
Salt to taste
Cook corn & let cool a bit. Combine all ingredients & serve with chips!