Begin by soaking the raisins in advance, for at least 30 minutes, to soften them.
Wash all the fruits you're going to use, including the apples and peaches.
Peel the apples and slice them into evenly sized-pieces.
In a saucepan, cook the apple slices. There's no need to add any butter, as we're opting for a healthier approach.
Once the apples have softened slightly, add the spices and mix them well with the apples. Allow this to cook for an additional minute.
Add lemon juice.
Next, add half of both the white and brown sugar, ensuring all the apples are evenly coated. Cook for another minute.
Pour in the soaked juice, but keep the raisins in the bowl.
Add salt, and lemon zest and thoroughly mix everything together.
When the liquid in the pan starts to bubble slightly, turn off the heat. Add the cornflour.
Switch to low-medium heat and mix well.
Turn off the heat again and cover the saucepan with a lid. Let it sit on the stove for 5 minutes to cool slightly, and allow the flavours to meld.
While waiting for the filling to cool down, destone the peaches and slice them into slightly thicker pieces than apple slices. Peaches don't need to be cooked in a saucepan; they soften quickly in the oven.