Arroz meloso is a way to prepare rice that is between the dry rice dishes like paella and arroz caldoso which is more like a soup with rice. A very popular arroz meloso here in Valencia is made with lobster. The keys to this dish are the stock you use and timing. Start with a flavorful stock and you will have a great dish. Overcook the rice and you'll have paste so set your timer for 15-18 minutes.