1 tbsp olive oil
1 small red onion, finely diced
pinch of sea salt
1 clove garlic, finely sliced
1 lb cherry tomatoes, halved
1/2 cup caster sugar
1/2 cup red wine vinegar
sea salt and freshly ground white pepper (to taste)
-Add the oil to a small saucepan and cook the onion with a pinch of sea salt over medium heat for about five minutes or until the onions have softened
-Add garlic and cook for additional 1-2 minutes
-Add cherry tomatoes, sugar, vinegar, sea salt, and pepper; mix well
-Turn the heat up to high and let the mixture to come to a boil. Keep at high heat for 15-30 minutes until the mixture has thickened and looks jammy.
-During this time, gently break down any tomatoes with a wooden spoon and stir the mixture from time to time to prevent it from sticking to the pan and burning.
-Once the mixture has thickened, taste for seasoning. You man want to add some more sugar or more vinegar.
-Spoon into sterilized jar and leave it to cook completely before sealing. Refrigerate and the relish will last a few weeks.
Get fancy and add a few ingredients of your own, Worcestershire makes a tasty addition as well.