Prepare ingredients: cut 21 oz cauliflower into bite-sized florets; trim and cut 5 oz green beans into 1-inch pieces; peel and slice 1 onion; mince 2 cloves garlic; drain and rinse 1 cup canned chickpeas; measure 1/3 cup dry roasted peanuts and set aside; have 2 Tbsp vegetable oil, 4 Tbsp soy sauce (or tamari), 2 Tbsp cane sugar (or vegan honey), ½ cup vegetable broth, 1 Tbsp rice vinegar, 2 Tbsp corn starch, ½ tsp ginger powder, ⅛ tsp hot chili powder or flakes, and salt and pepper ready.
Make the sauce: in a small bowl whisk together 4 Tbsp soy sauce, 2 Tbsp cane sugar (or vegan honey), 1 Tbsp rice vinegar, ½ cup vegetable broth, 2 Tbsp corn starch, and ½ tsp ginger powder until the cornstarch is fully dissolved and the mixture is smooth.
Blanch the green beans: bring a pot of water to a boil, add the cut green beans, and cook 3–4 minutes until tender-crisp; drain and set aside.
Heat the pan: place a wok or large frying pan over medium heat and add 2 Tbsp vegetable oil.
Cook aromatics: add the sliced onion, minced garlic, and ⅛ tsp hot chili powder (or flakes) to the hot oil and cook, stirring, 1–2 minutes until the onion begins to soften and the garlic is fragrant.
Add cauliflower: add the cauliflower florets to the pan, season with salt and pepper to taste, and cook 5–6 minutes, stirring occasionally, until the cauliflower is browned in places and tender-crisp.
Thicken with sauce: raise the heat to medium-high, stir the sauce briefly (the cornstarch may settle), pour the sauce into the pan, and cook 3–4 minutes, stirring frequently, until the sauce thickens and coats the cauliflower.
Finish the dish: return the blanched green beans to the pan and add the drained chickpeas and 1/3 cup dry roasted peanuts; stir and cook 1–2 more minutes until everything is heated through and coated with sauce.
Serve: taste and adjust salt and pepper as needed, then remove from heat and serve.