Heat the oil in a large saucepan and add the garlic slices

When the garlic starts to colour add the other ingredients

Mash down the tomatoes with the back of a wooden spoon

Bring to the boil

Let it simmer for a couple of minutes

Push the sauce through a dive to remove the garlic , basil leaves and pips

Scrape the bottom of the sieve into sieved sauce

Discard the contents of the sieve

Put the sauce back on the hob and simmer for at least 5 minutes