Combine Ingredients: In a small saucepan over medium-low heat, whisk together peanut butter, coconut milk, soy sauce, lime juice, maple syrup, sesame oil, garlic, ginger, and red pepper flakes.
Simmer: Heat gently for 3–4 minutes, stirring constantly, until the sauce is smooth and well combined.
Adjust Consistency: Add water 1 tablespoon at a time until the sauce reaches your desired thickness.
Taste & Adjust: Balance flavors with more lime (tanginess), syrup (sweetness), or pepper flakes (heat).
Serve: Use immediately or store in the fridge for later. Warm slightly before serving if thickened.