200g fruit sugar (this is what Hawksmoor use, but a little more brown sugar would be fine, and probably cheaper!)
60g salt
250ml white wine vinegar
8 whole peppercorns
1 whole star anise
3 cloves
2 tbsp smoked paprika
Instructions
Add all ingredients except peppercorns, star anise and cloves to a large pan and mix.
Bundle remaining spices into muslin (or similar) and tie with string, and add.
Bring to boil and then drop to simmer for 2 hours (or until it's quite thick - it will thicken more later), giving the odd stir.
Using a sieve, or preferably a chinois and pestle, push all of the hot ketchup through. This is the most labour intensive step, and probably takes 10-15 minutes.
At this point, if you want to to keep your ketchup for more than a few weeks (before opening), then follow these instructions. Otherwise, thoroughly clean and immerse 1.5 litres of glass bottles or jars in boiling water for 5 minutes to sterilise.
Fill bottles or jars while still hot (both the ketchup and the glass), put lids on and leave to cool. Finally label and consume.
Recipe by Third Breakfast at https://thirdbreakfast.com/tomato-ketchup/