What were popular foods during the dust bowl?

From the text:

"They watched hungrily the unwrapping of the sandwiches, and their hunger-sharpened noses smelled the pickle, cheese, and Spam." (Page 25)

"soggy biscuits" (Page 55)

"The women worked over the fire, hurrying to get food to the stomachs of the family—pork if there was money in plenty, pork and potatoes and onions. Dutch-oven biscuits or cornbread, and plenty of gravy to go over it. Side-meat or chops and a can of boiled tea, black and bitter. Fried dough in drippings if money was slim, dough fried crisp and brown and the drippings poured over it.

Those families which were very rich or very foolish with their money ate canned beans and canned peaches and packaged bread and bakery cake; but they ate secretly, in their tents, for it would not have been good to eat such fine things openly." (Page 134)

Source(s): The Grapes of Wrath