How to Make It
Bake the french fries according to package directions until golden and crisp. Meanwhile, in a small skillet, melt the butter. Add the garlic and cook over moderate heat until light golden, about 3 minutes. Add the sage and cook until fragrant, about 1 minute.
In a large bowl, toss the fries with the garlic-sage butter and the pecorino until well coated. Season with pepper and serve at once.