Start by cooking the wontons according to package instructions (if using frozen) or until they float and are fully cooked through. Drain and set aside.
12 wontons
In a heatproof bowl, combine the grated garlic, red pepper flakes, ground Sichuan peppercorns, Chinese five spice powder, sesame seeds, and sugar. Set aside.
1 clove garlic, ½ - 1 teaspoon red pepper flakes, ½ teaspoon ground Sichuan peppercorns, ½ teaspoon Chinese five spice powder, ½ tablespoon sesame seeds, 1 teaspoon granulated sugar
In a small pot, heat the chili oil (use more of the oil, less of the crisp) until it just starts to shimmer or bubbles form when you stick a wooden chopstick in (about 350°F / 175°C), then carefully pour the hot oil over the spice mixture. It should sizzle and become aromatic.
3 tablespoon chili oil
Add the soy sauce, black vinegar, warm water, and a pinch of salt into the mixture. Stir to combine into a spicy, savory sauce.
2 tablespoon soy sauce, 1.5 tablespoon black vinegar, 1 tablespoon warm water, Pinch of salt
Toss the cooked wontons in the sauce until evenly coated. Transfer to a serving dish and sprinkle with chopped green onions. Serve immediately.
1 green onion