Place your small saucepan on low heat and add a splash of water to warm gently.
Add the natural peanut butter to the saucepan, whisking constantly until it melts into the water and becomes smooth and glossy, about 2 minutes.
Stir in soy sauce, rice vinegar, honey, and freshly grated ginger, whisking to combine everything into a uniform, velvety sauce.
Continue gently whisking the mixture for another 3–4 minutes until it thickens slightly and develops a shiny, smooth texture.
Check the consistency—if it’s too thick, whisk in a splash of hot water until it loosens to your desired coating texture.
Remove the sauce from heat and stir in fresh lime juice for brightness, tasting and adjusting soy or lime as needed.
Let the sauce sit for a few minutes to allow flavors to meld and deepen, then give it a final stir.
Serve warm over your favorite noodles, roasted vegetables, or grilled proteins for a rich, nutty finish.