Quick Ratatouille

3/4 c. Italian dressing
1 med. onion, chopped
1 eggplant, peeled, cut into 1-inch cubs
2 med. zucchini, cut 1/2 inch slices
3 med. green peppers, cut into strips
4 tomatoes, peeled, in wedges
1 (8 oz.) can tomato sauce
1/2 tsp. basil
Salt and pepper to taste

In large saucepan heat Italian dressing and cook onions until tender. Add remaining ingredients. Simmer covered, stirring occasionally 30 minutes or until vegetables are tender. Serve hot or cold.