They make this all over Spain and each region has its own take on it. We had some recently at a restaurant right near the Portuguese border and it was made with Pennyroyal... loads of it along with raw onion and peppers chopped very small. The overall effect was very minty. If you are a fan of mint (which I am not) then you would no doubt find it very refreshing on a hot summers day.
75g bread, crusts removed.
1kg of plum tomatoes (currently 1 euro 45 per kg here but by the end of the summer we shall be able to buy 3kg for 1euro on the market.)
2 large garlic cloves
a large pinch of ground cumin
a teaspoon of salt
6 or 7 tblsp of good olive oil
vinegar to taste.
Soak the bread in enough water to cover for 15 minutes or so then squeeze the excess water out and put the wet bread into a food processor.
Skin the tomatoes and add to the food processor along with the rest of the ingredients except for the olive oil and vinegar.
Now... I have a real bugbear when it comes to skinning tomatoes. All the recipes say that if you pop them into hot water for a minute or two the skins just come right off. Nope. That has never worked well for me. I find I have to pierce the tomato skin in several places and then leave it in a pan of boiling water (while it continues to boil) for a good few minutes. This does make the tomatoes warm - but otherwise I don't get the skins off without a lot of hassle so needs must.
Process until very smooth and then while the motor is running pour in the olive oil. The gazpacho should turn paler in colour as the olive oil emulsifies into it.
Stop the machine and take the lid off. Add the vinegar (a couple of tablespoonfuls first) and taste. Keep adding a little more vinegar until you get the taste just slightly tart. It should taste refreshing.
Add a little water if it is too thick. How much? Mmmm the advice is that it should be neither thick nor thin... does that help?
Put into a bowl in the fridge to chill and then serve it very cold with an ice cube or two in the centre of each bowl. In some parts they add finely chopped onion, green pepper and more tomatoes to serve. You could experiment with yoghurt or creme fraiche in the middle... and maybe some basil leaves to garnish... mmmm... that would be nice. I love Gazpacho. There is nothing more refreshing on a very hot day. Enjoy.