Add the Greek coconut yogurt, peanut butter, Asian sweet chili sauce, red curry paste, lime juice, sugar, soy sauce, rice vinegar, cilantro, garlic, dried basil, and ground ginger to a blender or food processor.
Blend until smooth, scraping down the sides as needed.
With the motor running, add 3–4 tablespoons milk gradually until the dressing reaches your desired consistency; add more milk if needed.
Taste and adjust seasoning with additional sugar or sweet chili sauce if desired.
Chill the dressing before serving.
Store leftovers in an airtight container in the refrigerator for up to 7 days.