Preheat oven to 425 F. Wash potatoes and cut into fries, then rinse under cold water until water runs clear to remove starch. Pat potatoes dry with a clean towel or paper towel, then line two baking sheets with parchment paper.
Add fries to baking sheets, then toss with olive oil and season with salt. Spread fries across both baking sheets evenly, ensuring fries are in an even layer. Bake for 12-15 minutes per side until fries are crispy.
While fries cook, heat a large skillet over medium-high heat then add ground beef, crumbling with a spatula and seasoning with salt & pepper. Cook for 7-8 minutes until cooked through then remove from heat.
While beef cooks, prepare cheese, lettuce, tomatoes, pickles and onions, then mix sauce ingredients together in a bowl.
OPTIONAL BONUS STEP: remove beef from the skillet then add a bit more olive oil and diced onions, seasoning with salt and pepper. Cook for 5 minutes until onions are browned and softened then remove from heat.
In the last 2 minutes of cook time, add grated cheese to the fries and cook until just melted.
Remove fries from the oven, top with ground beef, veggies and sauce, then serve and enjoy!