PLACE eggplant in colander. Sprinkle with salt; mix lightly. Let stand 30 min. Rinse, drain and pat dry with paper towel.
HEAT 1/4 cup dressing in large nonstick skillet. Add eggplant; cook and stir 6 to 7 min. or until softened and browned. Spoon eggplant to side of skillet. Add 3 Tbsp. of the remaining dressing, peppers, zucchini, garlic and onions to center of skillet; cook and stir 3 to 5 min. or until vegetables are tender. Spoon to side of skillet. Add remaining dressing and tomatoes; cook and stir 3 min. Mix vegetables and tomatoes; cover. Cook on low heat 15 to 20 min. or until vegetables are very tender, stirring occasionally.
STIR in basil.