Preheat an air fryer or the oven to the temperature indicated on the french fry bag. If using the oven, line a large baking sheet with parchment paper. If using the air fryer, you can use an air fryer liner if you have one.

Arrange the french fries on the prepared baking sheet in a single layer or add them to an air fryer so they overlap as little as possible (if using an air fryer smaller than 8 quarts, you’ll need to cook the fries in 2 batches). Bake or air fry the french fries until golden and crisp, following the instructions on the bag for timing, 10 to 15 minutes. Sprinkle with salt to taste.

Lower the oven or air fryer temperature to 300°F.

On the baking sheet or in the air fryer basket, sprinkle half of the fries with half of the mozzarella. Pile the other half of the fries on top and sprinkle with the rest of the cheese. Bake or air fry until the mozzarella is fully melted, 5 to 7 minutes.

While the fries bake, add the gravy packet to a medium saucepan over medium-high heat. Gradually whisk in the water. Bring the mixture to a rolling boil, about 2 minutes, whisking constantly. Continue cooking until slightly reduced and thickened, about 4 more minutes. Lower the heat to the lowest setting to keep warm.

Drizzle the warm gravy over the fries. Garnish with parsley, if using, and serve immediately. Disco fries are best served right away and do not store well. Love the recipe? Leave us stars and a comment below!