Three hours in a low oven concentrates a glut of tomatoes into something intensely flavoured and deeply sweet. Use them everywhere — pasta, toast, antipasto, pizza.
Heat oven to 140°C. Line two large baking trays with parchment.
Arrange tomato halves cut-side up on the trays. They can be close together but shouldn't overlap.
Scatter garlic slices and herb sprigs over the tomatoes. Drizzle generously with olive oil. Season with sugar, salt, and pepper.
Roast 2.5-3 hours until the tomatoes have collapsed, shrivelled at the edges, and concentrated into something deeply flavoured. They should still be moist, not dried out.
Cool on the trays. Store covered in olive oil in the fridge for up to 2 weeks, or freeze for 3 months.
These are worth making in huge batches. The flavour is extraordinary and they keep well. Pack into jars covered with olive oil.
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