Preparing tomatoes:Wash the tomatoes and chop them roughly. You don't need to peel or deseed them; that'll happen later. You can even leave the stems on; they're packed with flavor! It'll be removed during the sieve anyway.
Basic baking:Heat the olive oil in a large saucepan. Add the sliced garlic cloves and sauté briefly until fragrant with the herbs of Provence.
Add tomatoes:Add the tomatoes to the pot along with the salt. Bring to a boil and simmer gently for 30 minutes, or until the tomatoes are breaking down. Add the basil leaves for the last 5 minutes.
Passing:Remove the pot from the heat and pass everything through a food mill or fine-mesh sieve. This will produce a smooth passata without any skins or seeds.
Boiling down:Return the strained sauce to the pot and simmer for another 20-30 minutes, allowing the passata to thicken slightly and the flavours to concentrate.
Tasting:Taste and season with salt if necessary.
Save:Pour the hot passata into sterilized jars or bottles. Seal tightly and let cool upside down to ensure a good vacuum seal.
 
          
          
          
          
            
              Tips
            
            
              - For a more neutral passata, you can leave out the herbs and add them later to each dish.
 - Tijs likes to add bay leaf for the taste
 
Storage instructions 
- In the refrigerator: Up to 1 week in a closed jar.
 - In the freezer: Up to 6 months in portions.
 - Canned/in jars: Up to 1 year if properly sterilized and vacuum sealed.
 - Warm up: Heat gently in a pan before use.