Preheat 10" non-stick sauté pan over medium-high heat.
Salt and pepper salmon filets.
Add olive oil to preheated pan and add salmon filets, flesh-side down.
Sear for 3 minutes, flip, and sauté for 3-4 more minutes.
Remove salmon from pan and cover with foil.
Reduce heat to medium.
Add orange juice, dill, and scallions.
Reduce orange juice by half (3-4 minutes).
Stir in sour cream and white wine vinegar.
Remove from heat.
Salt and pepper to taste.
So serve, spoon 1-2 tablespoons of orange reduction over each salmon filet.
Garnish with sprig of fresh dill, if desired.