Step 1

Preheat oven to 275 F. Line a rimmed baking sheet with aluminum foil or parchment paper, then drizzle with olive oil. Pat salmon or arctic char dry with a paper towel, then place on baking sheet.

Step 2

In a small bowl, combine butter, shallot, chives, dill, lemon zest, salt, and pepper. Mix well, then spread evenly on top of the fish. Bake until barely cooked through, about 20-25 minutes (time may vary depending on the thickness of the fish -- pull salmon out when it registers 120 F in the center). Top with capers and serve immediately with lemon wedges.