Measure and combine soy sauce, sesame oil, miso paste, and sugar in a small bowl. Whisk until the sugar and miso are fully dissolved and the mixture is smooth.
2 tablespoons Soy sauce, 1 teaspoon Sesame oil, 1 teaspoon Miso paste, 1 teaspoon Sugar
Pour the mixture into a small saucepan placed over medium-low heat. Add water gradually while whisking constantly, until the sauce becomes smooth and slightly thickened, about 2–3 minutes.
2 tablespoons Soy sauce, 1 teaspoon Sesame oil, 1 teaspoon Miso paste, 1 teaspoon Sugar, 1/4 cup Water
Continue to cook, stirring gently, until the sauce is glossy and has thickened to a pourable but slightly viscous consistency. You should see it bubble gently and notice a richer color.
Remove the saucepan from heat and let the sauce cool slightly until it reaches a warm but not burning temperature.
Serve the Mounjaro sauce immediately as a dip or spread, with a garnish if desired. Its silky texture and vibrant shine make it an attractive addition to your Japanese-inspired dishes.