Besides sweet, sour, salty and bitterness, there is umami. Such a interesting word is Japanese standing for freshness. According to wikipedia, "Umami is a Japanese word meaning "savory" or "deliciousness" and thus applies to the sensation of savoriness, specifically to the detection of the natural amino acid, glutamic acid, or glutamates common in meats, cheese and other protein-heavy foods. "
Basically the "hearty" feeling is generated by MSG(Monosodium Glutamate) in some form.
One thing ...
