Cosmic Squash is an event item found during Breakdown Event. It can be stored in a Medium Resource Canister.
Cosmic Squash is either found from an EXO Dynamics Research Aid pods (LTE version), or crafted:
Cosmic Squash is the second tier resource found during the Breakdown Event and is used for crafting Omnugget. It can also be used to obtain rewards from the EXO Request Platform, but it's not recommended due to it's relatively low value.