Prep the produce: Roughly chop the carrot, onion, and ginger so your blender or food processor can handle them easily.
Add to blender: Place carrot, onion, ginger, garlic, rice vinegar, soy sauce, neutral oil, sesame oil, sugar or honey, and ketchup (if using) into the blender.
Blend until mostly smooth: Aim for a slightly textured consistency—thicker than vinaigrette, thinner than puree. Add 1–2 tablespoons water if it’s too thick.
Taste and adjust: Add more vinegar for brightness, a pinch more sugar for balance, or a splash of soy for deeper savoriness.
Season with salt and pepper.
Rest the dressing: Let it sit 10–15 minutes so the flavors relax and meld. It gets even better after an hour in the fridge.
Serve: Spoon over a simple salad of iceberg or romaine, shredded carrot, and cucumber—or use as a dip for crudités.