Grilled Potato - With fruit

4 Large Yukon gold potatos par cooked and sliced into large wedges Canola oil for brushing Kosher salt and black pepper 1/4 C Mayonnaise 2 Tbl Dijon mustard 2[...]

2 x Idaho baking potatoes , like russets peeled, sliced     into 12 pcs about 1/2"-thk, and     punched out with round cookie cutter 3 sm purple baking[...]