Make pasta according to the directions.
In a large skillet, heat olive oil and saute’ onions until tender, about 3 minutes. Season with garlic salt, ground pepper and parsley. Add whipping cream, stirring frequently. To thicken, mix corn starch with water and gradually pour into cream mixture. If it gets too thick, then add some pasta water until you get the consistency you like. Add smoked salmon, breaking it up into bite size pieces. Stir in capers and cooked pasta. Stir in parmesan cheese and serve immediately.