Mentaiko Omelet Recipe

Prepare egg mixture

Crack the 4 large eggs into a medium bowl and gently whisk until just combined; avoid incorporating too much air. In a separate measuring cup combine 1 cup water and 1/2 cup dashi stock. Warm slightly (lukewarm) so the temperature of the liquid is close to the eggs. Slowly stream the warmed liquid into the beaten eggs while stirring gently to create a uniform mixture. Season with 1/2 tsp salt and 1/8 tsp white pepper and stir to combine. Strain the mixture through a fine sieve into another bowl or large measuring cup to remove chalaza or foam — this yields a silky custard.

Prepare the mentaiko by slicing the sac and scraping out the roe into a small bowl. Lightly flake with a spoon and mix with 1 tsp soy sauce and 1 tsp mirin. Taste; the mentaiko is salty, so keep additional soy to a minimum. Reserve about half of this mentaiko mixture (approximately 30 g) to fold into the egg custard and keep the remainder for topping.

Fold the reserved mentaiko (about 30 g) gently into the strained egg mixture, distributing it without overworking the custard.

Grease a shallow heatproof dish (an individual ramekin or a small wide bowl 6–7 inch / 15–18 cm across) with 1 tsp neutral oil or butter to prevent sticking. Scatter the diced half tomato evenly across the bottom of the dish.

Pour the egg + mentaiko custard gently over the tomatoes, filling to about 3/4 of the dish height. This allows room for steam and prevents boil-over.

Sprinkle 1 tablespoon of grated parmesan lightly on top of the custard surface and drizzle 1/2 tsp toasted sesame oil around the surface for aroma. Reserve the remaining tablespoon of parmesan and remaining mentaiko for finishing.

Set up a steamer: bring about 2 cups of water to a gentle simmer in a pot large enough to hold your dish with a lid. Once steaming, reduce heat to low so the water maintains a gentle simmer (not a rolling boil). This prevents bubbles that will mar the custard texture.

Place the greased dish into the steamer. Cover the steamer and steam gently for 10–12 minutes for a shallow 4-cup dish (adjust time +2–3 minutes for deeper dishes). Check for doneness by gently shaking the dish — the custard should be mostly set with a slight jiggle in the center (like soft tofu). If you have a toothpick, insert near center; it should come out with just a little custardy residue, not raw liquid.

Carefully remove the dish from the steamer. Immediately spoon the remaining mentaiko mixture in small dollops across the surface, and place 30 g soy-marinated ikura (ikura zuke) in small clusters. Sprinkle the remaining 1 tbsp grated parmesan over the top for umami and light browning from residual heat.

Finish by sprinkling the chopped scallion over the custard. If you like a lightly browned top, briefly place the dish under a hot broiler for 30–60 seconds, watching closely; this is optional and will change the silky texture slightly. Serve warm.