When I need a fast dinner that still feels a little special, this 4-ingredient oven baked ahi tuna is one of those dependable back-pocket meals I come back to. Using frozen raw ahi tuna medallions means there is no thawing, no complicated prep, and barely any cleanup, which is perfect for a busy weeknight. The simple sauce bakes right over the fish, keeping it flavorful and tender while letting the tuna stay the star of the plate.
This dish is great with steamed rice, roasted broccoli, green beans, or a crisp side salad. If you want to round it out a little more, a scoop of jasmine rice or coconut rice works especially well with the savory sauce, and lemon wedges or a sprinkle of sliced green onion make an easy finishing touch.
4-Ingredient Oven Baked Ahi Tuna
Servings: 4
Ingredients
4 frozen raw ahi tuna medallions, about 5 to 6 ounces each
1/4 cup soy sauce
4 tablespoons melted butter
2 tablespoons lemon juice
Directions
1. Preheat your oven to 400°F and lightly grease an oven-safe glass baking dish if needed. Place the frozen ahi tuna medallions in a single layer in the dish.
2. In a small bowl, stir together the soy sauce, melted butter, and lemon juice until combined.
3. Pour the sauce evenly over the frozen tuna medallions, turning them gently if needed so the tops are coated.
4. Bake for 18 to 22 minutes, or until the tuna is cooked through and flakes easily with a fork. The exact time can vary depending on the thickness of the medallions.
5. Spoon some of the pan sauce over the tuna before serving, and plate with rice or vegetables if desired.
Variations & Tips
Add garlic: If you want a little more flavor without adding much work, stir in 1 to 2 teaspoons of minced garlic with the sauce. It gives the tuna a deeper savory taste that goes really well with rice.
Use a citrus twist: Lime juice works nicely in place of lemon juice if that is what you have on hand. You can also add a little fresh zest right before serving for a brighter finish.
Watch the bake time: Ahi tuna can dry out if it bakes too long, so start checking on the earlier side, especially if your medallions are smaller. I like to pull them once they are just cooked through and still moist in the center.
Make it meal-prep friendly: Serve the baked tuna over rice bowls with a green vegetable for easy lunches the next day. Store leftovers in an airtight container in the refrigerator and enjoy within 1 day for the best texture.