Put lettuce, onion, eggs,zucchini and tomato in a large salad bowl. Set aside.
Cook bacon in a heavy skillet over medium heat, turning until crisp, about 5 minutes. Place on newspaper(paper towels) to drain and pour off all but 2 Tablespoons of grease from the skillet. Add vinegar, and sugar to grease and cook over low flame, stirring until sugar dissolves.Stir in cream, salt, pepper and paprika, then boil until thickened slightly, about 2 minutes.