high quality rice
粱 centers on high-quality grain, specifically fine rice or millet. It refers to superior staple food, often contrasted with coarser grains.
粱 combines 米 (rice/grain) with a phonetic component derived from 梁 (リョウ). The upper part historically relates to a bridge or beam, but here it primarily indicates the sound, while 米 specifies the meaning as a type of grain.
The bottom 米 is rice. The top looks like a complex structure with water (氵) and a knife (刀) cutting something. Imagine a special irrigation system (氵) and careful cutting (刀) used to cultivate only the finest grains, resulting in high quality rice.
For リョウ, think of a 'ryo' (an invented name) chef who only cooks with the highest quality rice. Ryo -> リョウ, and his dishes are always made from 粱.