• Place the watermelon cubes in a blender and purée. Strain the juice through a sieve into a large bowl. Add the wine, liqueur, lime juice, agave, and mint. Muddle until the mint is bruised. Chill until very cold, about 2 to 3 hours. Strain into a large punch bowl or several large carafes.
• Prepare a medium-high (400°F to 475°F) charcoal or gas grill fire. Brush the watermelon slabs and the lime slices with the olive oil. Grill for 3 to 4 minutes, until grill marks appear. Cut the watermelon into 1-inch cubes.
• Add the grilled fruit and mint sprigs to the sangria. Serve in tall glasses over ice. Garnish with the lime slices.

*Use of this recipe by anyone under 21 years of age is prohibited by US Law. Please enjoy these recipes responsibly.