Appetizers / Soups / Salads

I have this recipe from a relative who lives in the north of Greece. She lives in a town called Alexandria, which is half an hour's drive from the royal palace at Pella and the tomb of Alexander the Great's father and son at Vergina, but because of the dispute over the name Macedonia I've chosen to call this salad Alexandrian. She always has a big tub of this ready chopped in the fridge, and at each meal she puts some in a serving bowl and adds extra virgin olive oil. She also adds a tsp of citric acid as a preservative. I've asked Husband, who is a chemist, and he says it's harmless but if you prefer you could use the fresh juice of one lemon instead (our relative says it goes dark that way, I haven't tested this because I use the citric acid). It will keep a week, refrigerated. With two salads a day it will be gone before then. In Constantinople they have a similar salad called Politiki, with the addition of garlic.