This verdant risotto uses a savory vegetable stock as its base and is finished with the intense color and aroma of fresh basil juice. The last minute addition of some pecorino romano not only adds body but boosts the glutamic acid content of the risotto making it the perfect base to serve the buttery ōtoro (tuna belly) on. By torching the surface of the ōtoro, it melts most of the fat in the tuna making each bite dissolve into a rich pool of briny flavor that's a perfect compliment to the herbaceous risotto.