Activate the yeast: in lukewarm milk, stir in sugar and yeast, then let stand for 10 minutes, until foamy.
In a large bowl, combine the flour and salt, then rub in the butter until evenly distributed and the mixture resembles coarse crumbs.
Grate the garlic and mix it into the flour mixture, along with half of the grated cheese.
Add the sour cream, egg, and activated yeast, then knead the dough thoroughly until it comes together.
On a floured surface, roll out the dough to about 2 cm thickness, then fold it in thirds three times to create a flaky texture.
Cover with a kitchen towel and let rest for 30 minutes to allow the dough to rise slightly.
Roll out again to about 2 cm thickness, then use a scone cutter to cut out the shapes.
Place the scones on a baking sheet lined with parchment paper and brush the tops with beaten egg.
Sprinkle the remaining grated cheese on top, then bake in a preheated oven at 350°F (180°C) for 20-25 minutes, or until golden brown.
Let cool slightly, then serve fresh, with a crispy exterior and a soft, crumbly interior.
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