Place a grill pan
over medium-high heat.
In a medium bowl, toss the fruit in the sugar to coat. Grill over medium heat, until a golden crust begins to form on the fruit, about 3 to 4 minutes per side.
In another medium bowl, mix together the mint, lemon juice, and simple syrup. Arrange the fruit on a serving platter, drizzle the mint syrup over top, and serve.