1. In a mixing bowl, combine warm milk, sugar, and yeast. Let it sit for 5 minutes.
2. Add flour, salt, and softened butter. Mix until a dough forms.
3. Knead the dough for about 10 minutes. Let it rise for 1 hour.
4. For the filling, mix ground walnuts, sugar, cinnamon, and warm milk.
5. Roll out the dough, spread the filling, and roll it up. Cut into rolls.
6. Place rolls on a baking sheet and let them rise for another 30 minutes.
7. Preheat oven to 350°F (175°C). Bake for 25 minutes or until golden brown.