The broken vegetable knife is a vegetable chopping knife which shattered while the player, stuck in Evil Dave's body, was forced to do chores as punishment for being double grounded by Doris. A replacement vegetable chopping knife can be obtained from the Edgeville General Store. The shopkeeper gives the player the knife for free, believing Dave broke it while trying to help his mother.
The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!