In a small saucepan, combine rice vinegar, honey, water, soy sauce, gochujang, and garlic.
Bring to a gentle simmer over medium heat, stirring until sugar dissolves.
Mix cornstarch with water to create a slurry. Slowly whisk it into the simmering sauce.
Cook for 1–2 minutes until the sauce thickens slightly.
Remove from heat and let cool slightly before serving.