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Capturing the nuanced flavors of citrus zest in oil is an excellent way to quickly add it to various dishes. You can use any combination of citrus, depending on what is in season in your area. I normally use canola oil or another neutral tasting oil but this even works well with olive oil.
Lightly scrub the outside of the citrus then remove the zest with a vegetable peeler or zester. Make sure little to no pith came off as well, using a paring knife to remove any.
Place the zest and canola oil in a whipping siphon. Seal the whipping siphon, fully charge it, and swirl for 20 to 30 seconds. Let the siphon sit for a minute and a half longer. Place a towel over the siphon top and vent it. Open the siphon and wait until the bubbling stops.
Strain the oil and let sit for at least 5 minutes before using.