Home-Dried Tomatoes
Slow-roasted plum tomatoes. Sweet, jammy, deeply savoury.
The supermarket semi-dried tomato is a sad, vinegary compromise. The home version is a different beast entirely: plum tomatoes roasted low and slow until the water cooks off and the flavour concentrates into something glossy, sweet and savoury at the same time. Make a big tray on a Sunday and use them all week — in the Roasted Vegetable & Smoked Gouda Frittata (/theory/roasted-vegetable-cheese-frittata), on toast, through pasta, on a cheese board.
Low oven (120°C) drives off moisture without browning or caramelising too aggressively — that's the whole trick. Lose the water and the natural sugars, glutamates and acids stay behind in the same little package, so every bite is more tomato than a fresh tomato. Olive oil, garlic and thyme don't add flavour so much as protect what's already there.
Tips & Tricks
- →Plum / roma is the only correct choice — less water, denser flesh. Round salad tomatoes turn to mush.
- →If they're tasting flat at the supermarket, the pinch of sugar is doing real work. Mid-season tomatoes don't need it.
- →The leftover oil is liquid gold. Use it to dress salads, finish soup, or fry the next morning's eggs.
Flavour Twists
Add ½ tsp smoked paprika with the salt for a faux-sun-dried, BBQ-leaning version.
Crush a pinch of chilli flakes and fennel seed across the tops — perfect for pasta night.
Oregano or marjoram in place of thyme leans the flavour Greek/southern Italian.
Submerged in oil and refrigerated: 2 weeks. Always lift them out with a clean spoon — any water in the jar kills the shelf life.
Low oven. Long time. Big payoff.
Method
- 1
Prep
Heat oven to 120°C / 250°F (fan off). Line a tray with parchment. Halve tomatoes lengthwise and arrange cut-side up in a single layer — no crowding.
- 2
Season
Drizzle with olive oil. Scatter sliced garlic, thyme leaves, salt, pepper and the optional pinch of sugar across the tops.
- 3
Slow roast
Roast 2.5–3 hours until shrunken, glossy and deeply red. Edges should be slightly chewy, centres still a touch juicy. Rotate the tray once halfway through.
- 4
Cool and store
Cool on the tray. Pack into a clean jar and cover completely with olive oil. Refrigerate.
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