Preheat your oven to 375°F (190°C).

In a skillet over medium heat, brown the ground beef, seasoning with salt, pepper, garlic, and onion powder for added flavor. Cook for about 6-7 minutes until no longer pink, then drain the excess grease.

Stir in the ketchup, mustard, and mayonnaise to your cooked beef. Add diced onions and pickles if desired.

Grease a 9×13-inch baking dish and spread the frozen French fries in an even layer at the bottom. Spoon the beef mixture over the fries.

Generously sprinkle the shredded cheese over the top of your beef and fries.

Slide your casserole into the preheated oven and bake for 25-30 minutes, or until the cheese is bubbly and golden brown.

Allow the casserole to cool for 5 minutes before garnishing with fresh parsley. Serve hot.