• Pre-heat oven to 350°F.

To prepare the peaches:

• Slice the peaches into large wedges; about 8 per peach.
• Evenly spread the peaches in the bottom of a 9-inch x 9-inch glass baking pan.
• In a small bowl, mix together the brown sugar, corn starch, cinnamon and nutmeg; add vanilla extract; mix to thoroughly combine.
• Sprinkle the mixture over the sliced peaches.

To prepare the crumble and serve:

• In a large bowl, toss together the baking powder, flour, rolled oats and brown sugar.
• Using your hands, rub the butter thoroughly through the dry ingredients until fully incorporated.
• Press the crumble mixture together in handfuls; break apart into bite sized pieces and spread evenly over the top of the prepared peaches.
• Place in the pre-heated oven and bake for about 45 to 50 minutes or until the top is well browned and the fruit is bubbling underneath the crumble.
• Remove from the oven and serve with ice cream or whipped cream, optional.