Fill a 2 quart sauce pan 2/3 to the top with water. Add vinegar and bring to a simmer. Open eggs into the water and try to gather the whites around the yolks. Cook briefly for 1 to 2 minutes to keep the eggs runny.
In a food processor, combine all dry ingredients, thyme and zest. Add chilled butter and pulse to small pieces. Add egg/milk mixture and incorporate. Do not over mix. Remove from processor and roll out on a floured surface. Using a 2-inch round pastry cutter, make circles and bake on parchment lined baking sheet at 350 degrees for 12 to 14 minutes until golden brown. A toothpick inserted in the center should come out clean.
In a small saute pan on medium heat, add 1 tablespoon oil and saute lemongrass and scallion whites until soft, about 4 minutes. Season and set aside. In a bowl, whisk together juice, coriander, scallion greens and remaining oil. Add lemongrass and check for seasoning. In another bowl, mix crab and fennel. Add 2/3 of the vinaigrette and toss to coat. Check for seasoning.
PLATING: Cut the biscuits in half. Lay a little salad down to prevent sliding and place the bottom half of the biscuit on the salad. Top biscuit with a small mound of salad and a poached egg. Drizzle on vinaigrette and rest top half of biscuit against the mound.
Beverage Suggestion: Jasmine Tea, Black Coffee, Fresh Orange Juice