Put a pot of water on to boil - generously salt the water. When boiling add the pasta and cook to al dente. When the timer's up, drain and rinse with cold water. Sprinkle with a teaspoon of olive oil & a teaspoon of seasoning salt (I use McCormick's). Set aside to cool.Slice the olives, dice the celery into a small dice and thinly slice the green onions. Drain the tuna and flake it well.Add the olives, celery, green onions and tuna to the pasta. Also add the grated parmesan cheese, ½ teaspoon salt & ½ teaspoon pepper. Mix to combine. Add the mayonnaise & miracle whip - equal amounts of each. Depending on how warm the pasta is you may need to add additional mayo & miracle whip - just eyeball it. You want this to be nicely creamy.Tuck it in the fridge when you're done - stir well before serving, add additional mayo/miracle whip if needed.