Open the game and join a server with the Cooking event/update active
Look for the Cooking Kit item in the event or shop area
Interact with the Cooking Kit stand or NPC
Buy or claim the Cooking Kit using the required in-game currency or event requirement
Check your inventory or hotbar for the Cooking Kit
Place it in your garden to start cooking
If it is not available, wait for the event rotation or check for level, quest, or update requirements