Preheat the oven to 400 degrees F. Place the butter in a 11x7 baking pan and place in the oven to melt. When melted, remove the baking pan and place on a heatproof surface. Add the milk, baking mix, and sugar to the pan and mix until smooth. Drop the pie filling by spoonfuls over the batter. Place the pan in the oven and bake at 400 degrees F for 30-35 minutes or until bubbly and the batter is puffed and lightly browned. Remove from the oven and serve warm.