Seed & core the peppers. Cut peppers, tomatoes & onions into cubes. Cut eggplants & zucchini into 1/2" cubes. Wash, drain & saute in 6 tb olive oil along with the garlic, sweet pepper, salt & black pepper, until slightly softened.
Add green peppers & onion & a little more oil if necesary & stir & cook over a low heat until the vegetables are tender but crisp. Add tomatoes hot peppers, toss once & remove pan from heat. Let cool. Sprinkle with olive oil & lemon juice & pile high on the lettuce leaves.
Sprinkle each portion with parsley & serve.