TWO people have died and two children are recovering in hospital after several people were poisoned by a toxic batch of guacamole. The fatally contaminated avocado dip was served up to unsuspecting customers at a food festival before they showed signs of botulism. School cook Valeria Sollai, 62, is said to have eaten the guacamole and then was rushed to hospital. But she died on Monday after spending weeks on life support. Roberta Pitzalis, 38, also ate the same batch of guacamole at the festival in Sardinia - before dying on August 8. An autopsy confirmed Roberta died from a...