LETTER BANK XXIX

A letter bank is the shorter of two words, whose letters may be used to make a longer word. The letters may be repeated as necessary, but no other letters are allowed. For example, IMPS is a letter bank for MISSISSIPPI.

Lettuce is a SHORT we eat,
In a LONG (from chickpeas), it's a treat

Answer:

LEAF
FALAFEL 

Credit:
The Enigma 
NPL Magazine
October, 2019
BROBBERTY