Heat olive oil in a medium skillet. Season salmon cubes with salt and pepper and cook over medium heat for approximately two minutes on each side. Remove to a 9×13-inch baking pan and set aside. If necessary, spray pan with cooking spray to prevent sticking.

Preheat oven to 350 degrees Fahrenheit (180 degrees Celsius).

Meanwhile, heat orange juice in a small saucepan. Bring to a boil; cook until liquid is reduced to one-third of a cup. Cool slightly.

Transfer to a blender. Add remaining ingredients; cover and process until well blended. Adjust seasoning if necessary.

Pour sauce evenly over fish, reserving one-third of a cup to drizzle when serving, and bake for 15 minutes. If desired, place under grill for a minute or two to crisp the pieces. Garnish with chives.