1. In a small bowl, mix yogurt, mayonnaise, mustard, lemon juice, celery salt, 1/4 teaspoon salt, and 1/4 teaspoon pepper.
2. In a large bowl, mix corn kernels, tomatoes, kidney beans, lettuce, cucumber, basil, cheese, and eggs. Add dressing and mix gently to coat, or serve dressing separately, to spoon over individual servings. Add more salt and pepper to taste.