Take the onion,tomato and capsicum and chop them into small pieces. Put them in a bowl and add the olive oil,oregano ,salt and pepper. Mix them all and put the bowl in the refridgerator for 5 min minimum ( you can put it in the fridge for many days but covered).Take the sauce, mix it with butter and spread it on a slice of bread . Add mozzarella cheese, the veggies again the mozzarella and heat it in the microwave till the cheese melts.
