First, dissolve the sugar and yeast in the milk.
Place the flours in a bowl, add the oil and the milk mixture, then also incorporate the egg, lemon peel and salt.
Knead for at least 10 minutes, until you obtain a smooth and elastic dough.
Cover the bowl with a clean cloth and let rise for about 2 hours or until doubled in size in a warm place.
Peel the apples, wash them and cut them into small cubes, then cook them for about 15 minutes over a low heat, mixing with butter, lemon juice, sugar and cinnamon.
When they have softened, turn off and let cool.
Leave the raisins to soak in hot water for at least 10 minutes: before using them, drain them and squeeze them lightly.
Divide the dough into pieces of about 40 g each.
Take one piece of dough at a time, flatten it with your hands, place a little filling (apples and raisins) in the center and close the dough over the filling, sealing well.
Place the loaves, with the closure facing downwards, in the lightly greased muffin molds and leave to rise again until doubled in size, it will take about 1 hour.
Break the cinnamon lengthwise.
Insert a piece of cinnamon into the center to act as a stem and cook for about 15 minutes in a preheated static oven at 170°C.
The apple heart brioches are ready, let them cool at least, then decorate them with a fresh mint leaf and serve.