In a small mixing bowl, whisk together the peanut butter, soy sauce, fish sauce, sweet chili sauce and grater ginger.
Add two tablespoons of water and whisk to make a creamy sauce consistency.
If the mixture is too thick, add up to two additional tablespoons of water, one tablespoon at a time, until the sauce is your desired thickness.
Let the sauce rest for at least 30 minutes before serving. (Can be made a day in advance.)
Whisk the sauce just before adding it to the bowl.