Preheat oven to 400 degrees
In a medium bowl add peaches, granulated and brown sugar, cinnamon, nutmeg, lemon juice and cornstarch and mix until combined
Place into a 11 inch cast iron skillet or baking dish,
in another medium bowl add the flour, sugars, baking powder, salt and mix.
Add butter cubes and using your fingers or a pastry cutter blend until it resembles wet sand.
Mix in the hot water just until combined.
Spread topping over peaches, and sprinkle with granulated sugar.
Place skillet or pan on a baking dish to prevent spills. Bake 30-35 minutes.
Serve with ice cream or whipped cream.