Note: This kimchi will get more and more sour as it ages. It can be eaten immediately, but is optimal at around 3 weeks. For a more traditional kimchi, replace the miso paste with 1/4 cup fish sauce or 2...
The sweet-sour marinade is cooked down to a syrupy glaze that's brushed on the salmon as it cooks. The citrus and maple flavors would also be tasty with pork. Garnish fillets with orange slices, if desired.