Bring a pot of water to a boil, salt the water, and then cook scallops in the water for 2 minutes. Remove from boiling water and submerge immediately into an ice bath. When cool, thinly slice scallops into 3 to 4 slices each.
In a medium saucepan, combine 1 cup of chopped ginger, garlic, and lemongrass and saute in olive oil for 5 minutes. Add coconut milk and coconut water and cook for another 10 minutes, until it becomes aromatic. Strain the liquid and allow it to cool, discard the solids.
In a mixing bowl combine scallops, lime juice, strained coconut liquid, jalapeno, chives, red onion, and tomato; season, to taste, with salt, pepper, and ginger juice. Serve garnished with toasted coconut sprinkled on top.