1, salmon dip is mustard and swastika sauce, the authentic way to eat is to separate mustard from swastika sauce, put mustard into salmon, and then dip it in soy sauce. But you don't have to follow the rules. You can fully mix mustard with soy sauce and dip it in salmon, although the latter may be said to be "not eating", so what's the matter, just be happy.
2. It is best to choose salmon near the fish maw. The white lines are many and clear, and the white lines are fat parts. The more fat, the higher the quality of fish. Fresh salmon is orange-red, and the oil on the surface of the fish will glow under the light. Gently press the fish with your fingers, which is elastic.