1.
Bill Clinton is committed to a plant-based diet except for eating an occasional fish dish.
2.
Bill Clinton is committed to a plant-based diet except for an occasional fish dish.
3.
Bill Clinton is committed to a plant-based diet except that he eats an occasional fish dish.
(be) committed to (v.p.) – be willing to work very hard at something
ocassional (adv.) – happening sometimes but not often or regularly
a fish – a fish dish / some fish (table food)
