- 1 medium fennel bulb, thinly sliced
- 1 blood or navel orange, very thinly sliced, seeds removed
- 1 Meyer or regular lemon, very thinly sliced, seeds removed
- 1 red Fresno chile or jalapeño, with seeds, thinly sliced
- 4 sprigs dill, plus more for serving
- Kosher salt, coarsely ground pepper
- coarsely ground pepper
- 1 2-pound skinless salmon fillet, preferably center-cut
- 3/4 cup olive oil
- Flaky sea salt (such as Maldon)
- Preheat oven to 275°F. Toss fennel, orange slices, lemon slices, chile, and 4 dill sprigs in a shallow 3-quart baking dish; season with kosher salt and pepper. Season salmon with kosher salt and place on top of fennel mixture. Pour oil over.
- Roast until salmon is just cooked through (the tip of a knife will slide through easily and flesh will be slightly opaque), 30–40 minutes for medium-rare.
- Transfer salmon to a platter, breaking it into large pieces as you go. Spoon fennel mixture and oil from baking dish over; discard dill sprigs. Season with sea salt and pepper and top with fresh dill sprigs.