If you’ve ever sat at a high-end sushi bar and watched the chef flash-sear a piece of fish with a sizzling oil, you know exactly the kind of flavor profile I am chasing here today. This salmon udon with lemongrass scallion oil feels like a flex without actually being one. While this sizzling oil method is one of those viral cooking techniques, it’s actually super easy and this is a very calming weeknight recipe. Nothing fussy. No long marinades. The oven does the work, and the ingredients really do the magic.
This recipe starts with a big, beautiful piece of salmon, roasted hot and fast so the edges caramelize while the center stays tender and juicy. Just salt, chili flakes, dried garlic, and a little coconut aminos or Yuzu Ponzu (personal fave) for savory depth. But the real personality comes from lemongrass scallion oil. Hot oil meets scallions, lemongrass, chile, ginger, and garlic, and blooms instantly into something deeply fragrant. Coconut aminos or Yuzu Ponzu cut through the richness just enough to keep you going back for another bite.
Now, I know sizzling scallion oil has been done before. But there is something SO EXCITING about the fresh lemongrass in this recipe that brightens it up and brings this unique aroma with the garlic, chili and scallions.
Let’s not forget the udon. For this bowl, I used these thick chewy noodles as the base, and they loveeeee to be slicked with the lemongrass oil and loosened with a splash of coconut aminos and toasted sesame oil.
I like brown rice udon here for a healthier option. It’s hearty, nutty, and feels a little more virtuous. But honestly, regular udon is perfect as well. Udon is just great, no matter how it’s served!!! And if you don’t want to do noodles, this salmon would be just as happy over a bed of jasmine rice, regular udon, ramen, or even a pile of charred bok choy if you’re skipping the carbs. Or skip the carbs entirely and serve this salmon and oil over sautéed greens or roasted vegetables. Still a knockout.
Why you’ll love this recipe
- Salmon feels so nourishing to eat, can stand up to a wide range of flavors and cooking styles, and pairs well with noodles, rice, or vegetables.
- You get the brightness of lemongrass, the warmth of ginger, and the umami of Yuzu Ponzu in under 30 minutes.
- The sizzling oil technique gives you that professional “finished” taste that usually requires a reservation.
- High-quality fats from salmon and avocado oil, paired with slow-burning udon, make for a meal that actually keeps you full.
Substitutions and swaps
- Udon Noodles: Swap for soba, ramen, or even good old white rice. If you’re gluten-free, brown rice noodles are a perfect match.
- Salmon: This recipe works wonders with sea bass, and shrimp.
- Yuzu Ponzu: If you can’t find it, use a mix of soy sauce and fresh lime or lemon juice (about a 2:1 soy to citrus ratio) and a touch of mirin or sugar to mimic that citrus-umami punch.
- Minced Dried Garlic: If you’re out, the Trader Joe’s Chili Garlic seasoning is a fantastic “all-in-one” shortcut. You can also season your salmon with a simple salt and pepper. The oil does most of the seasoning work.
Tips that matter
- The “Sizzle” Factor: Make sure your oil is shimmering (NOT TOO HOT OR SMOKING) before you drop in the aromatics. You want that immediate tsss sound to lock in the flavors and keep the scallions bright green.
- Don’t Overcook the Salmon: Take the salmon out when it’s still slightly opaque in the center; it will continue to carry-over cook while it rests on the platter.
- Save the Water: Always reserve a little udon cooking water. It’s the secret to “loosening” the noodles so the oil coats them evenly rather than just sitting at the bottom of the bowl.
- Pat the Fish Dry: Use a paper towel to dry the salmon skin and flesh, leaving them bone-dry before seasoning. This ensures the spices stick and the fish roasts instead of steaming.
What to serve this with
- Smashed Cucumber Salad: A cool, vinegary contrast to the rich salmon and warm oil.
- Steamed Edamame: Topped with a little sea salt for an easy, protein-packed side.
When should I make this Salmon Udon
This salmon udon with lemongrass scallion oil recipe is my go-to for a “Wednesday win”—when you’ve had a long day and need a win in the kitchen, but don’t have the energy for a marathon session. It also scales beautifully for a casual dinner party where you want to serve something that looks highly “composed.”
Make ahead, storage & reheating
- The Lemongrass Scallion Oil can be made up to 3 days in advance.
- Store the salmon and noodles in separate airtight containers for up to 2 days.
- Reheat the salmon gently in a 300°F oven to prevent it from drying out. The noodles are best reheated in a pan with a tiny splash of water to loosen the oil.
Common mistakes & how to avoid them
- Using Garlic Powder: Avoid substituting garlic powder for the minced dried garlic in the salmon. Powder will burn in a 425°F oven, whereas the minced dried version toasts into a delicious, nutty crust.
- Boiling the Lemongrass Oil: Once you add the aromatics to the hot oil, pull the pan off the heat after 30 seconds. If you leave it too long, the ginger and garlic will turn bitter.
- Draining the Noodles Too Early: Udon can get gummy if they sit in the colander for too long. Time it so they go straight from the pot into the oil/water mixture for the best texture.
Salmon Udon with Sizzling Lemongrass Scallion Oil
Ingredients
For the Salmon
- 1½ – 2 lb salmon fillets skin on
- Kosher salt
- Red chili flakes
- Minced dried garlic not garlic powder
- 1 – 2 tsp coconut aminos or yuzu ponzu
- Avocado oil spray or light drizzle
For the Lemongrass–Scallion Oil
- ½ cup neutral oil (avocado oil preferred)
- 5 – 6 scallions thinly sliced (white + green parts)
- 3 stalks lemongrass finely minced (tender inner stalk only) or 2–2½ tsp lemongrass paste
- 1 Fresno chile thinly sliced (seeds optional)
- 1½ tsp freshly grated ginger
- 1 garlic clove finely grated
- ¾ tsp kosher salt
- 1 tbsp coconut aminos or yuzu ponzu (yuzu ponzu preferred if available)
For the Udon
- 12 oz fresh or shelf-stable udon noodles
- Reserved udon cooking water as needed
Directions
Roast the salmon
- Heat oven to 425°F. Line a sheet pan with parchment.
- Pat the salmon very dry, then place it skin-side down.
- Season evenly with kosher salt, a pinch of chili flakes, and minced dried garlic.
- Drizzle lightly with coconut aminos, then finish with a spritz or light drizzle of avocado oil.
- Roast for 15 minutes, until just cooked through and still juicy in the center.
- Transfer to a platter.
Cook the udon
- Cook udon according to package directions.
- Reserve ½ cup of the cooking water, then drain.
Make the lemongrass–scallion oil
- Heat neutral oil in a small saucepan over medium heat until shimmering but not smoking.
- Add scallions, lemongrass, Fresno chile, ginger, garlic, and salt. Everything should sizzle immediately.
- Cook 20–30 seconds, just until fragrant and bright green.
- Remove from heat.
- Stir in coconut aminos or ponzu off heat.
Assemble
- Toss hot udon with 2–4 tbsp of the scallion oil, loosening with a splash of reserved noodle water if needed.
- Top with salmon and spoon more scallion oil over everything.
- Serve immediately.
Rate & Review
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