well, I am coming from a very different background (Poland under communism) so we had our own style of poisons ;-)
first - a lot of bread. often bread only with margarine, as a dessert - bread with margarine and table sugar (or salt for savory snack). bread for every meal :D when the bread rolls went stale my Mom would soak them (in pieces) in warm milk mixed with some sugar for breakfast. a lot of "kasha" which is a group name for all "corn looking" food made of grains, like barley, wheat pieces, fine/thickly grounded grains, buckle wheat etc.
caramelized sugar made into drops, hard candies a lot of beans, peas.
then later on, when everything was already available, I was still eating a lot of bread (one year in collage I lived basically on bread with mustard and ramen soups), pasta, potatoes, chips, pitas, muesli etc.