Bake fries according to instructions on the bag. I use the McCain Superfries so I bake mine for 15 minutes at 450ºF.
Meanwhile, in a frying pan on medium heat add the olive oil and beef seasoned with the salt and pepper. Frying until cooked. Set aside.
Once fries are done, remove from the oven and set the oven to 350ºF. Separate the fries into 4 portions on the baking sheet they are in.
Now time for layering. For each portion, put half the fries in a oven safe bowl, sprinkle with 1/4 cup of cheese, some caramelized onions. Add the rest of the fries and top with cheese, caramelized onions, and steak.
Place in the oven for 10 minutes until the cheese has melted.
Take out of the oven and drizzle with chimichurri, sprinkle the green onions over and a dollop of sour cream.
Serve immediately.