Prep:
- Fry the peanuts: (Note: Skip this step if using already fried red-skin peanuts or dry roasted peanuts). Heat 1 tablespoon peanut oil in a small pot over medium-high heat. Once hot, turn the heat down to medium-low and add the red-skin peanuts. Fry gently, moving the peanuts often and shaking the pot by the handle occasionally, until the skins are a deep shade of reddish-brown – about 2-3 minutes. Use a slotted spoon to transfer to a paper towel lined plate to drain. Then transfer to a sheet of parchment paper/nonstick cooking paper and allow to cool while you prepare the rest of the ingredients.
- Prepare the fresh and dry ingredients: Slice/cut the Welsh onion (or spring onion white and light green parts), garlic, ginger, fresh red chilies (if using), Sichuan red peppercorns and dried chilies as indicated in the ‘ingredients’ section. (Tip: Shake out and discard some or all of the seeds from the dried chilies for a milder dish.)
- Make the sauce: Whisk together the potato starch, white sugar, kosher salt, low sodium light soy sauce, Shao Xing rice wine, Chinkiang vinegar, dark soy sauce, sesame oil and water in a small measuring cup (or bowl) until combined well.
For the Kung Pao Tofu Puffs Stir-fry:
- Stir-fry the aromatics: Add the remaining 3 tablespoons of oil to the wok and heat over high heat. Once hot, add the Welsh onion white parts, garlic and ginger. Stir-fry for 20-30 seconds until fragrant.
- Stir-fry the chilies: Add the fresh chilies, Sichuan red peppercorns and dried chilies. Stir-fry for 15 seconds to combine, taking care to not let the dried chilies and peppercorns burn.
- Add the tofu puffs and sauce: Give the sauce a quick stir with a spoon to loosen up the potato starch that will have settled at the bottom. Add the tofu puffs into the wok and pour the sauce over everything. Toss continuously for 30-40 seconds until everything is evenly coated in the sauce. (Note: If the sauce thickens too quickly, add a splash of water and continue tossing.)
- Toss through peanuts: Add the fried red-skin peanuts and toss briefly to combine, then switch off the heat.
- To Serve: Transfer to a serving plate or dish and serve immediately with warm steamed rice.