Preheat oven to 450 degrees.
In a small bowl, stir together the yogurt, mayonnaise, Parmesan, chives, Worcestershire sauce, and pepper.
If the salmon is skinned, place the fillets on a lightly greased baking sheet. If not, see the note below.
Spread mixture evenly over top of the salmon fillets.
Bake for approximately 10 minutes or until the salmon is just cooked through. I bake on the top rack which helps to brown the Parmesan mixture a bit. The mayonnaise in the topping is what will allow for the browning. If the fillets are thin, check 2-3 minutes early. Conversely, if your fillets are thick, they may require an extra minute or two. (Don’t hesitate to cut into the thickest part and take a peek. This is the best way to avoid overcooking if you aren’t sure.)