Place the flour, sugar, salt, 1 egg and crumbled yeast in the bowl of a food processor and knead with dough hook and knead.
Pour in the milk in a thin stream until the dough is homogeneous and smooth. Then add the softened butter cut into cubes and continue kneading for 10 minutes.
Cover the bowl with a clean, damp cloth and let rise for 2 hours.
Degas the dough and divide it into 20 pieces.
Roll out each piece of dough before filling them with a small handful of shredded mozzarella.
On a baking tray, place the dough balls side by side to form a Christmas tree.
Let rise for 1 hour.
Preheat the oven to 180°C.
Brown the brioche tree with the remaining beaten egg and sprinkle with black sesame seeds.
Bake for 10 minutes, sprinkle with the remaining shredded mozzarella and bake for a further 6-8 minutes.
Extract the juice from half a lemon, add the olive oil, chopped thyme and chives and season.Brush the tree with this mixture when you take it out of the oven and serve warm as an aperitif.
Curabitur ante ex, blandit vitae ipsum vitae, ultrices malesuada ipsum. In nisl ipsum, placerat in mauris sit amet, pellentesque ultricies leo. Etiam consequat ut massa et feugiat.