In a saucepan over medium heat, mix together the chopped apples, sugar, butter, cinnamon and mixed spice. Mix the cornstarch and water together in a small bowl and set aside.
As soon as the apples start to soften, it might take 3 minutes, add the cornstarch mixture.
Let the mixture cook for another 3 minutes. Take it off heat and mix in the raisins. Let it cool slightly before using in the pies.