Soak cut potatoes for 30 min; pat dry.
Toss fries in oil and spices.
Bake fries at 425°F for 25–30 min.
Brown ground beef with diced onions.
Add taco seasoning and simmer 5 min.
Make cheese sauce with butter, flour, milk, and cheese.
Assemble fries with cheese sauce and beef.
Sprinkle with extra cheese and broil briefly.
Top with sour cream, guac, pico, etc.
Serve hot and enjoy immediately.