In ungreased 8-inch square pan, spread pie filling and sliced peaches; place in cold oven. Heat oven to 400°F; let pie filling and peaches heat 10 minutes.
Meanwhile, in small bowl, mix baking mix, 1 tablespoon sugar, the milk and butter with fork until soft dough forms.
Remove pan from oven. Drop dough by 6 spoonfuls onto warm peach mixture. Sprinkle with additional sugar and nutmeg.
Bake 18 to 20 minutes or until topping is light brown.