Literally sweet and sour mediterranean vegetables. It's really important to sweat the initial stuff gently in a covered saucepan over a low heat for around 7-10 minutes. Also you do need to drain the tomatoes well and squeeze out most of the juice. It's vital you use good quality tinned tomatoes (ones from Italy are usually the best). This is deceptively tasty for such a simple dish, Absolutely fantastic with say grilled swordfish or BBQ lamb cutlets. Try this out it really is a magic recipe and one of those unbeatable combination of flavours from Italy.Keeps well refrigerated for a couple of days. Great for dinner parties as it go so well with meat or seafood, does not need heating and can be prepared well ahead of time. I've used it over the years in a number of restaurants where I've cooked.