How to Make It
Preheat grill to medium-high (400°F to 450°F). Or heat a grill pan over medium-high. Brush both sides of peach halves with olive oil. Place peach halves on oiled grates, cut side down, and grill, uncovered, until grill marks appear, about 1 minute. Flip peaches, brush 1 teaspoon of the maple syrup on cut side of each peach half, and grill until tender throughout, about 1 more minute.
Stir together yogurt, mascarpone, and remaining 1 teaspoon maple syrup in a small bowl. Serve peaches warm or at room temperature, topped with mascarpone mixture and mint.