Cut peaches in half. Discard pits.
Prepare grill with pan spray. Place peaches cut side down and mark on medium high heat grill. Flip peaches over.
Brush peaches cut side evenly with 1 tsp per peach half.
Cover peaches and cook until tender or move peaches to a sheet tray.
Cover peaches and cook until tender or move peaches to a sheet tray and bake in a 350℉ degree oven until tender.
In a bowl, stir together wheat flour, oats, second listed honey, cinnamon, and butter until evenly mixed.
Spread oat mixture on a sheet tray. Bake until golden brown, about 8 minutes in a 350℉ degree oven.
Top each peach half with Greek yogurt, oat crumble, and drizzle with third listed honey.