Heat grill to medium-high heat.
Brush corn cobs with olive oil, then place onto grill.
Grill until charred, rotating a quarter turn every 3-5 minutes.
After corn is grilled, cool for 10 minutes, then cut kernels off the cobs into a bowl.
Add tomatoes, onion, cilantro, avocado, lime juice, olive oil, salt and pepper.
Serve at room temperature or cold.
Enjoy!!