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A good tomato in August barely needs a recipe. It needs salt, and it needs that salt at the right moment. We sliced a lot of tomatoes to find out when that moment is, and the answer changed how we make every tomato salad.
The test: four timings
We used ripe beefsteak and heirloom tomatoes from the same market stall, cut into 1.5 cm (½ inch) slices. Each plate of 500 g (1.1 lb) got 4 g (¾ teaspoon) of fine salt, about 0.8 percent of the tomato weight. The only difference was when.
| Salted | What happened | Verdict |
|---|---|---|
| At the table | Crunchy salt, bland flesh between bites | Uneven |
| 10 minutes ahead | Some juice, flavor starting to even out | Good |
| 20 to 30 minutes ahead | Pool of pink juice, every bite seasoned, flesh still firm | Best |
| 60 minutes ahead | Lots of juice, slices soft and slumped | Too long |
Why salt timing matters
Salt on a cut tomato draws water out of the cells through osmosis. That liquid carries sugars, acids and savory glutamates with it, and it collects on the plate. At the same time, salt dissolves into the surface of the slice, so it seasons the flesh instead of sitting on top.
Give it 20 to 30 minutes and you get the best of both: seasoned slices and a few tablespoons of intensely flavored tomato water. Whisk that with olive oil and vinegar and you have a dressing that tastes more of tomato than anything you could buy. Wait too long and the cell walls weaken enough that the slices go limp.
Late-summer tomato salad
Serves 4 as a side. Active time: 10 minutes. Total time: 35 minutes.
- 900 g (2 lb) ripe tomatoes, mixed sizes and colors
- 7 g (1¼ teaspoons) fine salt
- ½ small red onion, very thinly sliced
- 1 tablespoon red wine vinegar
- 3 tablespoons good olive oil
- A handful of basil leaves
- Black pepper and flaky salt, to finish
- Slice large tomatoes into 1.5 cm (½ inch) rounds and halve the small ones. Lay them on a platter in one layer, overlapping a little.
- Sprinkle evenly with the fine salt. Leave at room temperature for 20 to 30 minutes.
- Meanwhile, toss the onion with the vinegar in a small bowl. The acid softens its harshness while the tomatoes sit.
- Tilt the platter and spoon the collected tomato juice into the onion bowl. Whisk in the olive oil.
- Spoon the dressing and onions over the tomatoes. Tear over the basil, grind on pepper and finish with a few flakes of salt for crunch.
Variations
- With bread: tear 100 g (3½ oz) of day-old sourdough into pieces, toast them in olive oil, and toss with the salad just before serving. They soak up the juices.
- With cheese: add torn burrata or crumbled feta. Cut the salt to 5 g if using feta.
- With peaches: swap a third of the tomatoes for sliced ripe peaches. Salt them the same way.