Oliver's Vegetables by Vivian French
Do you like chips? Oliver does. In fact, he won't eat anything else - until he plays a game with his grandpa.
Whatever vegetable Oliver finds in the garden, he must eat. On Monday, he pulls up carrots, on Tuesday, it is spinach . . .
An excellent book for parents with slightly fussy children, which also introduces the days of the week.
Other titles in this series:
Oliver's Fruit Salad