Fresh ahi is one of the actual luxuries of cooking in Honolulu, and it is wasted under a sweet glaze. I sear steaks hot and fast and spoon ginger-garlic butter over the top while they rest. Twenty minutes, one pan, and it tastes like I tried. This is early dinner on a work night when I already used my energy at Costco, not on a recipe with twelve steps.
Yield: 4 servings | Prep: 10 minutes | Cook: 8 minutes | Total: about 20 minutes
Hawaii Grocery Notes
- Foodland / Times: ahi steaks, 1 to 1½ inches thick if you can get them. Thicker is more forgiving. Ask for sushi-grade if you want the center rare, which I do.
- Costco: frozen ahi steaks in the freezer aisle when fresh is a splurge. Thaw overnight in the fridge. Pat extra dry.
- Don Quijote: fresh ginger, garlic, butter, sesame oil, shoyu, chili flakes.
- Skip bottled teriyaki, eel sauce, and “Hawaiian” glazes. None of them belong on this fish.
Ingredients
- 4 ahi steaks (about 6 oz each), 1–1½ inches thick, patted dry
- 1 tablespoon avocado oil
- Kosher salt and black pepper
- 5 tablespoons unsalted butter
- 3 garlic cloves, minced
- 1 tablespoon fresh ginger, minced or grated
- 1 teaspoon shoyu or tamari
- 1 teaspoon lemon juice or rice vinegar
- Optional: pinch of chili flakes
- Optional: 1 teaspoon toasted sesame seeds
- For the plate: a pile of greens, steamed broccoli, or leftover cabbage from kalua pig
Instructions
- Salt and pepper both sides of the ahi. Let it sit at room temperature 10 minutes while you mince garlic and ginger. Cold, wet fish will not sear.
- Heat a skillet over high until it is very hot. Add avocado oil. It should shimmer.
- Lay in the steaks. Do not move them. Sear 60–90 seconds per side for rare to mid-rare on a 1-inch steak. Thicker steaks can go 2 minutes per side. You want a browned crust and a deep pink center. If you cook ahi like chicken, you will be mad at me and at the fish.
- Transfer steaks to a warm plate. Drop the heat to low. Add butter to the same pan. When it melts, add garlic and ginger. Stir 30–45 seconds until fragrant, not brown.
- Add shoyu, lemon juice, and chili flakes. Stir once. Spoon the butter over the steaks. Rest 2 minutes. Sesame seeds on top if you are using them.
- Serve with greens or leftover cabbage. Spoon extra butter from the plate. That butter is dinner, not a garnish.
Kitchen-Estimate Macros (per serving)
Kitchen estimates only, not lab-tested. Calculated for one 6 oz steak plus a quarter of the ginger-garlic butter. Side vegetables not included (broccoli ~4 g net per cup; wilted greens ~1–2 g).
| Calories | Fat | Protein | Net carbs |
|---|---|---|---|
| ~360 | ~19 g | ~42 g | ~2 g |
Notes
- Hidden sugar: ponzu, teriyaki, oyster sauce, and bottled ginger dressings often carry sugar or mirin. The teaspoon of shoyu in this pan is there for salt and color. If even that bothers you, drop it and add a pinch more salt.
- Sesame-crusted ahi is fine on keto. Press seeds onto the raw steak before the sear. Count a gram or two extra if you go heavy.
- Leftover seared ahi is better cold, sliced over greens, than reheated. Reheating is how you get dry fish.