Core ingredients used in many other recipes.
Chilli jam, or tương ớt in Vietnamese, is a common condiment in Central Vietnam. I first tried it in Hoi An with some Cao Lầu. Without a supply of the original, I had to make some myself. It turned out to be a delicious and very versatile addition to a wide range of dishes.
Gravlax has its origins in Scandinavia in the Middle Ages where it was used as a way to preserve the salmon. The citrus, gin, and star anise add new layers of flavour to what can be achieved with the basic curing process.