Peel, slice and salt the eggplant to get rid of excess moisture.
Put in a deep skillet the olive oil.
Sauté the onions and garlic until golden.
Add whole pitted black olives.
Julienne the green peppers, remove the seeds and membrane. Add the green peppers.
Slice the zucchini in 1/2-inch slices. Add the zucchini.
Skinned, seeded, and quartered the tomatoes. Add the tomatoes.
Add the drained eggplant. Sprinkle the mixture with Olive oil.
Add 1/2 teaspoon oregano or 2 teaspoons chopped fresh basil.
Simmer covered over very low heat about 45 minutes uncover and continue to heat 15 minutes longer to reduce the amount of liquid. Add salt and a grating of fresh pepper.
Serve hot or cold with Cultured sour cream.