Preheat the oven to 425º F.
Blot salmon fillets with a paper towel and sprinkle with salt and pepper.
Cut 1/2 the zested blood orange and 1/2 the lemon into thin slices. Place slices onto each segment of parchment paper.
Place the salmon fillets on top of the citrus and top with the medley. Squeeze the remaining blood orange and lemon halves over each fillet, then splash with a little dry white wine.
Once assembled, fold one side of your parchment or foil over the fish. Fold over the other side, enclosing the fish. Twist the parchment ends and secure with butchers twine.
Bake for 15-17 minutes, or until the fillets are opaque and flake easily with a fork.
While the fish bakes, toast hazelnuts in a dry pan over medium heat for about 3-5 minutes, shaking the pan to prevent burning. The nuts will be golden and aromatic when they’re ready.
Serve in parchment or transfer the fillets, along with the blood orange and fennel medley, to a plate.
Top with fennel fronds and toasted hazelnuts.