Preheat a grill to 375°F or medium-high. Grease a medium cast-iron skillet. In a medium bowl, whisk together 1 cup flour, ¼ cup sugar and the baking powder. Mix in the milk and oil until just combined. In another medium bowl, toss together the nectarines, berries, remaining 1 tablespoon flour and 2 tablespoons sugar.
Gluten-Free Grilled Summer Fruit Cobbler
This cobbler is a taste of that easy last-days-of-summer simplicity. Just toss fruit with a sprinkling of sugar and flour (gluten-free or gluten-full), place it into a cast-iron skillet, top with the cobbler dough and grill it.
Spoon the fruit into the prepared skillet and dollop the dough over the fruit in 8 spoonfuls; sprinkle with sugar. Cover with foil and grill until the juices are bubbling, about 25 minutes. Remove the foil; let bake until golden, about 15 minutes more. Let cool for 5 minutes before serving.