Activate Grinding Station by tapping it and sacrificing a Food.
Camellia triggers, creating a 1/1 Squirrel creature token and a Food artifact token.
When the Food enters the battlefield, Grinding Station triggers, untapping Grinding Station.
Resolve the Grinding Station ability from step 1, causing target player to mill three cards.
Repeat.
This loop relies on a clever loop of artifact generation and sacrifice fueled by Peregrin Took's replacement effect. When you sacrifice a Food to activate Grinding Station, Peregrin Took ensures that the resulting creature creation from Camellia, the Seedmiser also generates a fresh replacement Food token. That incoming artifact immediately triggers Grinding Station to untap itself, letting you repeat the cycle indefinitely to mill your opponents out while generating an infinite supply of Squirrels, card draws, and sacrificed artifacts.