Roast the Brussels sprouts following my instructions on this air fryer Brussels sprouts recipe or oven-roasted Brussels sprouts recipe. Add only the oil, no spices or salt, use only for the cooking instructions.
In a small mixing bowl, whisk soy sauce, water, black vinegar, hoisin sauce, sugar, ground Sichuan peppercorn, ginger, and cornstarch. Set aside.
In a non-stick saucepan, warm sesame oil, add garlic and dried chili flakes, and cook for 10 seconds, then pour in the soy mixture made previously.
Simmer sauce for 3-4 minutes, stirring often until it thickens.
Add the roasted peanuts to the sauce and the roasted Brussel sprout halves.
Stir to coat the vegetables with the sauce and cook for 1-2 minutes until warm.
Serve with freshly chopped green onions and sesame seeds.
