It is easy enough to think of black caviar made of sturgeon eggs, red caviar made of salmon eggs, taramosalata, which is pureed cod roe, and botarga, the tuna or cod eggs that are often used in salads in Mediterranean countries.
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The shiso pasta can be made from fresh chopped leaves, sometimes combined with the crumbled roe of tarako, and the trick to success is not to cook the cod roe on the stove top, but to just to toss the hot pasta into it.