Sesame-Crusted Tuna Steak with Sautéed Bok Choy and Ginger
By the QuiteRecipes team (Jamy & Kaïna) | Food Service Professional, Early Childhood Expert & Parents
Ahi tuna rolled in white and black sesame, seared rare, beside bok choy bright with ginger and tamari — selenium, omega-3s and sesame lignans in eighteen minutes.
Tuna proves some ingredients shouldn't be cooked senseless: a good steak seared thirty seconds a side stays silken in the center while the sesame crust turns nutty and crisp. Black and white sesame bring more than looks, with lignans, calcium, and zinc on board, and bok choy brightened by ginger and tamari keeps the plate green and mineral-rich. Eighteen minutes from pan to plate, a weeknight that feels like a restaurant.
🥄 Ingredients
- 🫗 2 ahi tuna steaks (about 150g each)
- 🫗 3 tablespoons mixed white and black sesame seeds
- 🫗 1 tablespoon sesame oil
- 🫗 1 tablespoon tamari (or soy sauce)
- 🫗 4 baby bok choy, halved lengthwise
- 🫗 1 tablespoon fresh ginger, julienned
- 🫗 1 garlic clove, sliced
- 🫗 1 teaspoon toasted sesame oil, to finish
Nutrition Facts*
*Nutritional information is an estimate and may vary based on ingredients, brands and portion sizes. Values are provided per serving.
👨🍳 Instructions
Pat the tuna completely dry; press both sides into the sesame seeds so they cling.
Heat the sesame oil in a heavy skillet over high. Sear the tuna 30–45 seconds per side for rare, or 1 minute per side for medium-rare. Rest before slicing.
In the same pan, toss the bok choy, ginger, and garlic over high heat for 2–3 minutes with a splash of water — it should steam-sauté to tender-crisp.
Finish the greens with the tamari and toasted sesame oil.
Slice the tuna across the grain and serve over or beside the bok choy.
⚠️ Common Mistakes
- ✕
Cooking tuna beyond medium — ahi is best rare and is genuinely disappointing gray.
- ✕
Salting the bok choy early and quitting the steam-liquid — the greens need their own frying moisture.
- ✕
Using plain soy sauce and oversalting — tamari or reduced-sodium soy keeps the balance.
🔄 Variations
Swap tuna for salmon (cook through) or tofu (marinate first).
Add shiitake mushrooms with the bok choy for umami and vitamin D.
Serve over rice or the quinoa from the magnesium plate.
Finish with a squeeze of lime instead of the toasted oil for brightness.
🧊 Storage
- 📦
Tuna is a same-day, rare-is-better fish; don't keep cooked leftover rare tuna.
- 📦
The sesame crust blends can be premixed and stored in a jar.
💡 Chef Tips
Tip 1: The pan must be screaming hot — a timid pan sticks the crust and overcooks the center.
Tip 2: Slice tuna like you mean it: across the grain, 1cm thick, so the slices show the rare core.
Tip 3: Mix the black and white sesame 50/50 for color and a slightly different toast.
❓ FAQ
Q
What do sesame lignans actually do? They're plant compounds with mild phyto-hormone-like properties studied for gentle endocrine support — modest, sensible, and easy to enjoy in seeds like these.
Q
How does selenium fit in? Tuna and sesame are both selenium-rich; selenium supports thyroid function and antioxidant defenses that hormones depend on.
Q
Is it safe to eat tuna often? Enjoy it in variety — skipjack/ahi occasionally and smaller fish more often keeps the mercury question in perspective; follow your local guidance.
Q
Can I cook this for someone who wants tuna well-done? You can, but you shouldn't be friends with them (kidding) — medium at most preserves any moisture at all.
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About the Authors
This recipe and guide was developed, tested, and approved in our home kitchen and daily life. Jamy is a retired Food Service District Manager and Early Childhood Program Manager who spent his career overseeing multi-site restaurant operations, large-scale culinary production, and daycare menu management. Kaïna brings the ultimate real-world test: making sure it brings ease and joy to our kids on a busy weeknight.
Read more about our professional background and philosophy →