Heat the peanut oil in a small saucepan over high heat until it reaches 350°F / 175°C. 2. Carefully remove the pan from the heat and immediately stir in the chopped ginger and sliced green onions. It will sizzle! 3.
Cover the saucepan with a lid or heavy-duty aluminum foil and allow the aromatics to steep and infuse the oil for 30 minutes. 4.
Strain the oil through a fine-mesh sieve into a clean, heatproof jar, discarding the solids. 5.
Season the finished oil with a pinch of salt, stir, and let it cool completely.
Don't let the oil get too hot or start smoking. You want it to sizzle the aromatics to release their flavor, not burn them.