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Pennsylvania Entrepreneurs Market Tomato Alternative.

By Sandra Gottlieb, Lancaster New Era, Pa. Knight Ridder/Tribune Business News

Apr. 16--Sometimes necessity is the grandmother of invention.

When Hannah Savage was 2 years old, she bit into a piece of cheese-free pizza and broke out in red, itchy welts all over her small body. Her mouth and tongue swelled, and her system rebelled.

Because the toddler already had been diagnosed with an allergy to dairy products, her mother, Judy, quickly pinpointed tomato sauce as the culprit. Resigned to the growing list of food allergies her daughter was deve

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