1Grease a 9-inch square baking pan.Heat oven to 375^.
Combine the first 8 ingredients, and mix to blend. Spread in prepared pan; arrange peach slices on top to overlap and cover top. Mix together cinnamon and sugar and sprinkle over peach slices.
Mix together sour cream, egg and nutmeg; drizzle over top. Bake for 35-40 minutes, until toothpick inserted in center comes out clean. Serve warm with whipped cream or ice cream.