Pre soak clams in cold water for at least one hour to clean, rinse well and set aside.
To make butter; saute green onion, garlic and ginger in a small amount of oil until fragrant. Deglaze with soy sauce and cool. Cream soy ginger mixture into butter and set aside.
In a large bowl, cut butter into the flour until it resembles a coarse meal. Dissolve the salt into warm water and add it to the flour mixture. Mix until the dough comes together; don’t overwork the dough or it will be become tough.