Preheat the oven to 350 degrees F. Place the butter in an 8×8-inch baking dish and set it in the oven until the butter just melts. Remove the pan once melted.

In a large bowl, whisk together the oats, sugar, baking powder, salt and nutmeg. In a small bowl, whisk together the milk, eggs, peach jam and vanilla extract. Add the wet ingredients to the dry ingredients stirring until everything is combined and wet. Scrape the mixture into the buttered dish and stir until most of the butter is incorporated, but leave some pockets of butter in the corners. Smooth out of the top and add the peach slices.

Bake for 30 minutes or until golden brown around the edges. Serve hot with a splash of heavy cream, extra peaches, whipped cream and toasted almonds.