1. Shell golden century eggs, brush a little oil on a knife, then slice each of the century egg into six pieces; cook salty egg yolks in boiling water, then slice.
2. Boil quail eggs for 2.5-3 mins, then soak in ice water, shell and set aside.
3. Thinly slice onion; finely chop scallion; cook corn cob in boiling water, remove the kernels, set aside.
4. In a food processor, add garlic, coriander (with root), green and red bird’s eye chilli, squeeze some lime juice into the mixture, season with fish sauce and sugar, add a little water, then blitz to make a sour hot sauce.
5. Place onion on a plate, add golden century eggs, salty egg yolk, quail eggs and corn kernels, garnish with chopped scallion and chilli, drizzle sour hot sauce and serve.