Pat the shrimp dry and cut into smaller pieces, if necessary.
In a medium mixing bowl, add all the filling ingredients. Stir in one direction until mixture is sticky and all ingredients are well mixed together.
Hold the wrapper in a diamond shape. Spoon 1 teaspoon of filling in a wrapper. Using the bowl of water, dip your finger then wet the top two sides. Fold the wrapper by bringing one corner over the filling close to the opposite corner, forming a triangle on top. Gather the sides into the middle making sure no air pockets are left inside and pinch well.
Remaining uncooked wontons can be frozen by placing them in a single layer on a sheet pan. Once frozen, put them in freezer bags. Dumplings do not need to be thawed before cooking and can be cooked using the same instructions.
In a small bowl, combine the sauce ingredients. Add enough water to reach the consistency you like.
In a large pot, fill halfway and bring water to a boil. Drop several wontons into the water without overcrowding. Stir to make sure they are not sticking to the bottom and cook for 3-5 minutes until the wontons are floating to the top.
Serve wontons in a bowl and generously spoon peanut sauce over the wontons. Garnish with remaining green onions and cilantro.