Spread the cooked or reheated fries evenly across a baking sheet lined with parchment paper.
Spoon the heated chili evenly over the fries, covering them completely and creating a vibrant layer of spicy sauce.
Sprinkle the shredded cheese evenly over the chili and fries, ensuring good coverage for melting.
Place the baking sheet into a preheated oven at 375°F (190°C) and bake for about 10-15 minutes, until the cheese is melted and bubbly, with edges starting to turn golden.
Remove from the oven once the cheese has fully melted and the dish is hot and bubbling. Let it sit for 2 minutes before serving.
Serve directly from the baking sheet, accompanied by napkins for a messy, satisfying snack with gooey cheese and spicy chili.