Mentaiko Pasta (Fukuoka Spiced Cod Roe Pasta — Cold Sauce Method)

Mentaiko pasta is one of Japan's most successful Yoshoku (Western-influenced Japanese) dishes — spaghetti tossed with raw spiced pollock roe (mentaiko), butter, and a small amount of cream or cooking sake, finished with nori and shiso. Its origin is commonly traced to the jazz café culture of Tokyo's Roppongi district in the 1960s, but the soul of the dish is Fukuoka, where mentaiko (called karashi mentaiko — spiced with red pepper) was first commercialised and remains the city's defining export food. The technique is a cold sauce method, which distinguishes it from most pasta preparations. The mentaiko is mixed with softened butter and sake (or a small amount of cream) in a bowl before the pasta arrives — never cooked, never heated, as heat destroys the delicate salinity and changes the colour from vivid orange-pink to grey and unappetising. Hot pasta is drained and immediately tossed into the bowl, using the residual heat of the noodles to melt the butter and warm the roe just enough to become a coating sauce without cooking it. Mentaiko itself requires explanation. It is the spiced, marinated egg sac of Alaskan pollock (walleye pollock), packed in red chilli and salt, with origins in Korean myeongnan-jeot that came to Fukuoka via Korean immigrants in the post-WWII period. The Hakata (Fukuoka) version is distinguished by its relatively mild spicing compared to some Korean antecedents, and its use as a condiment across a wide range of Japanese applications — on onigiri, over white rice, as topping for chazuke, and in this pasta. Properly made mentaiko pasta has a creamy but not heavy texture, vivid orange colour, and a clean, oceanic salinity from the roe balanced by the butter's richness.