Preheat and grease the grill. Place corn on the grill and cook over medium-high heat for 5-10 minutes, rotating throughout, until slightly charred. Use a sharp knife to cut the corn off of the cob and place it in a medium bowl.
Add diced onion, cilantro, lime juice, salt, and garlic powder to the bowl and toss to incorporate ingredients. Serve immediately or chill until ready to serve. Serve with tortilla chips or alongside your favorite Mexican dish!
Notes
Make ahead up to 24 hours, store covered tightly in fridge, serve with corn chips.