Heat oil on medium-high in a medium sauté pan. Add in theonions. Sauté until beginning to turn translucent and tender, about 3-5 minutes.\nWhisk in 2 Tbsp Hong Kong sauce and 1 tsp salt. Reduce the heat to medium-low\/low and continue cooking, stirring occasionally, until the onions are well caramelized and very soft, about 10 minutes more. Remove from the heat and let cool completely.\nOnce the onions are cooled, mix with sour cream, remaining 1 Tbsp Hong Kong sauce, 1 tsp salt and ¼ cup scallions.Season to taste with salt and additional Hong Kong sauce, as desired.\nTop with more sliced scallions and serve alongside chips, crackers or your favorite crunchy veggies!