The story
From zest + -ful (suffix forming adjectives from nouns, with the sense of being full of, tending to, or thoroughly possessing the quality expressed by the noun).
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Of food, or an aroma or flavour: pleasantly piquant, pungent, or spicy; zesty. Full definition →
From zest + -ful (suffix forming adjectives from nouns, with the sense of being full of, tending to, or thoroughly possessing the quality expressed by the noun).
Etymology from Wiktionary, CC BY-SA 4.0.