1. Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.

2. Spread the frozen fries (or tater tots) on a sheet pan and bake for 10 minutes to jump-start crisping. (This helps prevent soggy fries in the casserole.)

3. While the fries pre-bake, cook the ground beef in a large skillet over medium-high heat, breaking it into crumbles, until browned and cooked through.

4. Drain excess grease, then add the diced onion and minced garlic. Cook for 2–3 minutes, until the onion softens and everything smells fragrant.

5. Stir in ketchup, mustard (if using), Worcestershire (if using), garlic powder, onion powder, salt, and pepper. Simmer for 1–2 minutes so the flavors meld.

6. Spread the beef mixture evenly in the prepared baking dish. Sprinkle 1 1/2 cups of the shredded cheese over the beef.

7. Layer the partially baked fries over the cheese in an even layer, then top with the remaining 1/2 cup cheese.

8. Bake for 20 minutes, or until the cheese is melted and bubbling and the fries are crisp and golden.

9. Let rest for 5–10 minutes before serving. Garnish with parsley if you like.