- 2 tablespoons olive oil
- 1/2 cup chopped onion
- 2 tablespoons chile-garlic sauce (such as Sriracha®)
- 2 teaspoons red pepper flakes
- 1 1/2 teaspoons minced garlic
- 1/2 cup water
- 1/4 cup creamy peanut butter
- 3 tablespoons ketchup
- 2 teaspoons Asian (toasted) sesame oil
- 1 tablespoon white sugar
- Heat olive oil in a saucepan over medium heat. Cook and stir onion, chile-garlic sauce, red pepper flakes, and garlic until the onion is tender, about 5 minutes. Add water, peanut butter, ketchup, sesame oil, and sugar to the onion mixture; cook and stir until smooth. Reduce heat to low and simmer until thickened, about 15 minutes.