Lemon Rouge Tuna (Baked Soy-Marinated Tuna)
A delicate and savory baked tuna dish, deeply infused with a complex 24-hour citrus and soy marinade. Served chilled and sliced for an elegant, refreshing appetizer.
This exquisite Lemon Rouge Tuna relies on an extended marination process to build its signature flavor profile. A complex blend of dark and light soy sauces, infused with fresh rosemary, galangal, and citrus, tenderizes the fish while imparting a deep mahogany hue. A quick, high-heat bake ensures the center remains delicate while sealing in the aromatic scallion oil.
Ingredients
- 500 g tuna blocks
- 600 g dark soy sauce
- 450 g light soy sauce
- 50 g oyster sauce
- 50 g seafood sauce
- 100 g sesame oil
- 160 g white granulated sugar
- 2 lemons
- 30 g sand ginger slices
- 50 g shallots
- 10 g fresh rosemary
- to taste cilantro
- to taste green onions
- to taste garlic slices
- to taste red chili peppers
- for brushing scallion oil
Instructions
- 1Prepare Aromatics and Lemons

Place sliced lemons, galangal pieces, and red chili peppers into a clean stainless steel mixing bowl to begin assembling the flavor base for the marinade.
Tip: Ensure the bowl is large enough to hold all the subsequent sauce ingredients and aromatics comfortably. - 2Add Fresh Herbs

Add fresh sprigs of rosemary and chopped cilantro directly into the stainless steel bowl containing the sliced lemons, galangal, and red chilies.
Tip: Fresh herbs release essential oils that deeply infuse the marinade during the 24-hour resting period. - 3Incorporate Alliums and Mushrooms

Layer green onion sections, shallots, and sliced mushrooms into the bowl over the existing bed of herbs, lemons, and aromatics.
Tip: Chop the green onions and shallots evenly to distribute their flavors uniformly throughout the vegetable marinade. - 4Add Granulated Sugar

Pour white granulated sugar directly into the center of the bowl on top of the accumulated aromatic vegetables and herbs.
Tip: The sugar will help balance the sharp acidity of the lemons and the salinity of the upcoming sauces. - 5Pour in Oyster Sauce and Sesame Oil

Pour the measured oyster sauce and loose sesame oil into the mixing bowl over the sugar and vegetable layer.
Tip: Pour the oil slowly to help coat the dry sugar and integrate smoothly with the other components. - 6Add Soy Sauces

Pour dark soy sauce and golden label light soy sauce into the mixture to complete the liquid base components of the lemon rouge tuna sauce.
Tip: Stir or combine the ingredients thoroughly after adding the dark and light soy sauces to dissolve the sugar. - 7Pour in Liquid Seasonings and Seafood Sauce

Pour the additional liquid seasonings and seafood sauce into the mixing bowl containing the aromatics and herbs to build the marinade base.
Tip: Ensure all measured liquid ingredients are poured in smoothly to maintain precise ratio balance. - 8Mix the Marinade Thoroughly

Use a spoon to stir and combine all the marinade ingredients, including the dark sauces, oils, sugar, and aromatics, ensuring the sugar is fully dissolved and the flavors are integrated.
Tip: Mix thoroughly from the bottom of the bowl to ensure the sugar and heavy sauces are fully incorporated. - 9Lift Marinated Tuna Blocks

Carefully lift the marinated tuna blocks out of the marinade bath after they have finished marinating, allowing excess liquid to drip off.
Tip: Wear food-safe gloves when handling the tuna blocks to maintain hygiene. - 10Arrange Tuna Blocks on Baking Tray

Arrange the marinated tuna blocks evenly on a foil-lined baking tray that has been pre-layered with fresh vegetables, scallions, onions, shredded ginger, and rosemary.
Tip: Space the blocks evenly apart to allow optimal heat circulation during baking.