noun which may take the genitive case particle 'no'
freshly ground
Used for coffee, pepper, sesame, and other items that are ground just before use. Often appears as a modifier before nouns (e.g., 挽きたてのコーヒー).
挽きたてのコーヒーは香りが格別だ。
Freshly ground coffee has an exceptional aroma.
この店では挽きたての胡椒を売っている。
This shop sells freshly ground pepper.
挽く is the verb 'to grind'; 挽きたて is the noun-modifying form meaning 'just ground'.
Compound of 挽き (continuative form of 挽く 'to grind') + たて ('freshly, just done').