1. Peel the potatoes, rinse them, and cut them into cubes.
2. Heat the oil in a pan and add the rosemary.
3. Let it infuse for a few minutes, then remove it.
4. Add the potatoes and cook for about ten minutes, stirring constantly.
5. Then add the rice and mix.
6. Pour in the broth and mix.
7. Bring it to a boil, then reduce the heat to low.
8. Cook everything.
9. Add the cheese and mix vigorously.
10. Sprinkle with pepper and serve the rice with potatoes and grated cheese.