1. Peel one sweet potato and cut lengthwise into two thin slices. Cut each slice lengthwise in thin stripes and put aside for the shrimps. Dice the rest of the sweet potatoes. Peel and dice the onions and the garlic.
2. Heat up the butter. Sweat the onions, the garlic and the ginger glassy. Add sweet potatoes and thyme and sweat with the rest. Fill in the poultry stock and the sweet potatoes and cook tender for 15 minutes. Take out the thyme. Puree and season the mixture to taste with salt, pepper and sugar.
3. Peel garlic and dice. Wash and dice the red pepper. Mix with coriander. Wash, dry and rub shrimps with paste. Cover and let marinate for ca. 30 minutes.
4. Lance the sweet potato slices through egg yolk and wrap around the shrimps. Heat up oil in a pan. Roast the shrimps from each side for 2 minutes. Put 2 shrimps each on wooden skewers. Fill the soup into soup bowls, place the shrimp skewer on top and serve garnished with coriander leaves.
Preparation time ca. 30 minutes + 30 minutes to marinate