In a blender (or using an immersion blender), combine peanut butter, soy sauce, rice vinegar, brown sugar, chili oil, lime juice, garlic and warm water and blend until a loosened sauce. Add water (1 tablespoon at a time) if the mixture is still too thick.
3 tablespoon creamy peanut butter, 1.5 tablespoon soy sauce, 2 teaspoon rice vinegar, 1 tablespoon brown sugar, 1-2 teaspoon chili oil, 1 tablespoon lime juice, 1 clove garlic, ⅓ cup warm water