5 tablespoons unsalted butter
2 tablespoons granulated sugar
1 cup thick crème fraîche
vegetable oil for greasing the grill
3 ripe but firm peaches or nectarines halved
6 slices pound cake (1-inch thick)
3 tablespoons chopped crystallized ginger
Heat a gas grill to high, covered, and when it’s hot, turn it to medium (this will get the grates sufficiently heated). Melt the butter in a small saucepan over medium heat on the stovetop. Whisk the sugar into the crème fraîche until smooth.
Use a grill brush and then a lightly oiled rag secured on long tongs to clean the grill thoroughly. Brush the cut sides of each peach half and both sides of the pound cake slices liberally with the melted butter. Grill the peaches cut side down, uncovered, until lightly caramelized, 1 to 2 min. Transfer them to a platter and cover with foil. Grill the pound cake slices on both sides until nicely toasted, about 3 min. total.
Cut each peach half into slices. Top each slice of pound cake with the sliced peaches. Spoon the crème fraîche over the peaches and scatter the crystallized ginger on top. Serve warm.