Bake or air fry the fries according to the directions on the package.

While the fries cook, prepare the gravy: Heat the oil in a large, deep-sided saute pan. Add the onions and cook 5 minutes, or until they begin to soften. Add the mushrooms and cook for 3 minutes, or until they soften and the color deepens. Add the garlic and peppercorns; cook 1 minute.

Stir in the flour; cook, stirring constantly, 1 minute, until no white remains.

Deglaze the pan with white wine (or water), scraping up any browned bits that are stuck to the bottom of the pan. Add the vegetable stock and sage. Simmer over low heat for 10 minutes, until thickened.

Strain the gravy through a mesh strainer to separate out the solids.

Add the fries to a bowl or serving dish. Toss with cheese curds. Pour gravy over top. If desired, top with some of the mushrooms and onions that were strained from the gravy.