What you need:

• Carrots
• Leeks
• Fennel
• Parsley
• Peppercorns
• Fennel Seeds
• Brown Onions (peeled)
• Bay Leaf
• Thyme

When making stock you can use a lot of the off-cuts that you would normally throw away such as carrot peels or the stalks of the parsley.

All you need to do is:

• Cover with water
• Bring to the boil 
• Simmer for at least 20 minutes