Prepare Your Ingredients: Mince the garlic and chop the red chili peppers. Set aside.
Mix It Up: In a saucepan over medium heat, combine water, sugar, rice vinegar, and salt. Stir until dissolved into a syrup-like mixture.
Add Flavor: Stir in minced garlic and chopped chili peppers. Simmer for about 5 minutes until fragrant.
Thicken It Up: Mix cornstarch with water in a small bowl until smooth. Pour into the saucepan while stirring continuously until the sauce thickens (about 2 minutes).
Cool It Down: Remove from heat and let it cool completely before transferring to an airtight container.
Serve and Enjoy: Drizzle over your favorite dishes or use as a delicious dip.