-
1
Dissolve the coarse sea salt in 2 litres of cold water in a large bowl. Submerge the live snails and leave them to purge for 2–3 hours at room temperature. They will expel internal sand and the foot will begin to soften. The water will cloud and darken — this is the intended result.
-
2
Drain the snails and scrub each shell individually under cold running water with a stiff brush. Residual grit on the shell surface will transfer directly to the sauce; every shell must feel smooth and clean to the touch before proceeding.
-
3
Warm the olive oil in a wide, deep pot over a medium-low flame. Add the crushed garlic and the peperoncino. Cook gently until the garlic is fragrant and pale gold at the edges — it must not brown.
-
4
Add the crushed tomatoes and half the basil leaves. Stir to combine, then add the 500 ml of water. The sauce must remain thin and soupy — not reduced and coating. Bring to a bare simmer; small bubbles at the surface only.
-
5
Add the scrubbed snails to the pot. They must be submerged in the liquid. This is where the dish lives or dies: maintain a gentle, patient simmer — never a rolling boil — for a minimum of 45 minutes. Aggressive heat toughens the meat irrevocably; the snails require sustained low temperature to become tender. Keep the pot partially covered and check regularly that the liquid has not reduced below the level of the shells, adding water as needed.
-
6
At 45 minutes, test doneness by inserting a pin or toothpick into the meat of one snail and withdrawing it with a gentle pull. The meat should come free with light resistance — not pop out freely (undercooked) nor crumble and shred (overcooked). If resistance remains firm, continue simmering and test at 10-minute intervals.
-
7
Remove the garlic cloves. Scatter the remaining fresh basil leaves over the pot. Ladle into deep bowls, ensuring each portion has ample broth. Place a toothpick or pin at each setting. Serve immediately with crusty bread.