Preheat oven to 300º Fahrenheit. Line a large-rimmed baking sheet pan with parchment paper, then drizzle with olive oil. Pat dry the salmon with a paper towel, then place it on a baking sheet.
In a small bowl, combine butter, chives, dill, parsley, lemon zest, salt, and pepper. Mix well, then spread evenly on top of the fish.
Bake salmon until just opaque in the center, about 18 to 20 minutes. Remove from oven, sprinkle capers on top, and serve immediately. Enjoy!
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