In a large bowl mix all the ingredients together with 1 tbsp sea salt, cover with cling film and marinate for 6 hrs. Then, in a food processor, pulse the tomato mix in batches until roughly chopped – don’t over-chop them to a mush.
Place three layers of muslin cloth, or a new kitchen cloth, over a large bowl and pour the mix into the cloth. Tie up with string and hang in a cold place for at least 15 mins over the bowl to collect the tomato essence. Set aside the pulp. Taste and correct the seasoning, if necessary, then cool in the fridge.
To serve, spoon a quarter of the diced tomato into the centre of four bowls. Carefully pour the chilled tomato essence around the tomato towers and garnish with the basil and a small drizzling of olive oil.