01 - Remove grapes from stems. Rinse thoroughly under cool water and dry completely with paper towels to ensure coating adheres properly.
02 - Place dried grapes in a large mixing bowl. Drizzle with fresh lime juice and agave syrup if using. Toss gently to distribute evenly.
03 - Sprinkle Tajín seasoning over the grapes. Toss continuously until each grape is evenly coated with the spicy-sour mixture.
04 - Spread coated grapes in a single layer on a parchment-lined baking sheet. Ensure grapes are not touching for even freezing.
05 - Transfer baking sheet to freezer. Freeze for at least 2 hours or until grapes are completely frozen solid.
06 - Serve frozen grapes directly from the freezer for optimal texture. Store leftovers in an airtight container for up to 2 weeks.