Unagi sushi bake is a delicious, layered casserole inspired by traditional Japanese sushi flavors but baked for a warm, comforting twist. Combining tender grilled eel (unagi), sushi rice, creamy mayo, and savory sauces, this dish works because it balances the smoky richness of the eel with creamy textures and subtle sweetness, making it perfect for sharing or casual dinners.
Ingredients
- 2 cups cooked Japanese short-grain sushi rice
- 1 1/2 cups unagi (grilled eel), chopped into bite-sized pieces
- 1/2 cup Japanese mayonnaise (such as Kewpie)
- 3 tablespoons unagi sauce (eel sauce) plus extra for drizzling
- 1 tablespoon soy sauce
- 1 teaspoon toasted sesame oil
- 1 teaspoon mirin (sweet rice wine)
- 2 sheets nori (seaweed), finely shredded or crumbled
- 1/4 cup shredded mozzarella or mild white cheese (optional)
- 2 green onions, thinly sliced
- 1 tablespoon toasted sesame seeds
- Pickled ginger, for garnish (optional)
- Wasabi or Japanese mayo for serving (optional)
Instructions
- Preheat your oven to 375°F (190°C). Lightly grease or line a 9×9-inch baking dish with parchment paper for easy cleanup.
- Prepare the sushi rice: If you don’t have freshly cooked sushi rice, reheat 2 cups of cooked Japanese short-grain rice until warm but not hot. Spread the rice evenly in the bottom of your baking dish, pressing gently to create a compact layer.
- Mix the unagi sauce layer: In a small bowl, combine the Japanese mayonnaise, 3 tablespoons unagi sauce, soy sauce, toasted sesame oil, and mirin. Stir well until smooth and creamy.
- Assemble the unagi layer: Scatter the chopped unagi evenly over the rice layer.
- Spread the sauce: Evenly spoon the mayo and unagi sauce mixture over the unagi and rice, smoothing it out with a spatula.
- Add cheese (optional): Sprinkle shredded mozzarella or your preferred mild white cheese over the top for a creamy, melty finish.
- Bake: Place the dish in the oven and bake for 15-20 minutes, or until the top is bubbly and lightly golden. If you want a more browned top, switch to broil and watch carefully for 1-2 minutes to avoid burning.
- Garnish and serve: Remove from the oven and sprinkle with toasted sesame seeds, shredded nori, and sliced green onions. Add pickled ginger on the side and a drizzle of extra unagi sauce, if desired.
- Serve warm: Cut into squares and serve with wasabi or extra Japanese mayo for dipping.
Tips
- Substitutions: If unagi (grilled eel) is unavailable, you can substitute with grilled salmon or smoked mackerel for a similar smoky, rich flavor. Use gluten-free soy sauce if needed for dietary restrictions.
- Rice texture: Sushi rice should be sticky but not mushy. If you’re cooking rice fresh, rinse it several times before cooking to remove excess starch. Use a rice cooker for best results.
- Storage: Store leftover sushi bake in an airtight container in the refrigerator for up to 3 days. Reheat covered in the oven at 350°F (175°C) until warmed through to maintain texture.
- Common mistakes: Avoid overbaking, which can dry out the rice and unagi. Also, don’t skip the mayo and unagi sauce layer; it’s essential for the creamy, savory flavor that defines the dish.
Serving Suggestions
Unagi sushi bake is wonderful served as a main dish alongside simple sides like miso soup, steamed edamame, or a crisp cucumber salad dressed with rice vinegar and sesame oil. It also pairs well with light pickled vegetables to balance the richness. For a casual gathering, serve with seaweed sheets so guests can scoop the bake onto nori wraps. A cold Japanese beer or green tea complements this warm, savory dish beautifully.
Variations
You can customize unagi sushi bake by experimenting with different toppings and mix-ins. Try adding chopped avocado for creaminess or a sprinkle of togarashi (Japanese chili pepper) for heat. Substitute the unagi sauce with teriyaki or a spicy mayo blend for a different flavor profile. For a vegetarian twist, replace unagi with grilled shiitake mushrooms or marinated tofu, layering with the same sushi rice and sauce mixture for a satisfying umami-rich bake.
Storage and Reheating
Store leftover unagi sushi bake in an airtight container in the refrigerator for up to 3 days. To reheat, cover the dish with foil and warm it in a preheated oven at 350°F (175°C) for about 10-15 minutes, or until heated through. Avoid microwaving if possible, as this can make the rice gummy and unevenly heated. If using a microwave, reheat in short 30-second bursts, stirring gently between intervals to distribute heat.
Frequently Asked Questions
Can I use fresh unagi instead of pre-grilled unagi?
Fresh unagi can be used but requires proper preparation and grilling before baking. Pre-grilled unagi (often vacuum-packed) is recommended for convenience and consistent flavor.
Is unagi sushi bake gluten-free?
Traditional unagi sauce and soy sauce often contain gluten. To keep the dish gluten-free, use gluten-free tamari or soy sauce and check the labels on unagi sauce or make your own gluten-free version.
What kind of rice is best for sushi bake?
Short-grain Japanese sushi rice is best due to its stickiness and texture, which helps the bake hold together. Long-grain rice will be too dry and separate.
Can I make unagi sushi bake ahead of time?
Yes, you can assemble the bake a few hours ahead and keep it refrigerated, then bake just before serving. Avoid assembling too far ahead as the rice may dry out or absorb too much sauce.
How spicy is unagi sushi bake?
This dish is generally mild since unagi sauce is sweet and savory without heat. You can add spicy mayo or togarashi pepper to increase the heat if desired.
Can I freeze unagi sushi bake?
Freezing is not recommended because cooked sushi rice changes texture and becomes hard or dry when frozen and thawed. It’s best enjoyed fresh or refrigerated for a few days.
Unagi sushi bake is a fantastic fusion dish that brings traditional sushi flavors into a warm, shareable casserole. Its balance of smoky eel, creamy sauce, and sticky rice makes it a crowd-pleaser that’s easy to prepare and endlessly adaptable.
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