Preheat your oven to 200°C. Peel 3 apples and cut them into thin strips. Spread the quince jam in the bottom of the tartlets and then arrange the apple slices in a rosette shape.
Using a cookie cutter, cut out a circle in the centre so that you can place the apple rose.
Using a mandolin, with the 3 remaining unpeeled apples, cut out a ribbon of apple and roll this ribbon into a rose shape, and place it in the centre of the tartlet. 1 apple can be used to make 2 roses.
Bake in the oven at 200°C for 35 to 45 minutes depending on the desired colour and your type of oven.