Jolly Green (Bean) Giant

Gusi loves green beans. Hmm. Let me rewrite that. Gusi LOVES green beans. Yesterday that is all he would eat. At lunch he helped himself to 3 servings of that and nothing else. Later he wanted some grapes. Dinner was only pleasant after green beans were put on display. Perhaps it is a "g" diet? I shouldn't complain, I know, but how can a child live off of green beans alone? Ok, and grapes. But still???