1. Cook pasta according to package directions. Drain and rinse with cold water.
2. In a large bowl, combine cucumber, tomatoes, pepperoni, olives and pasta and mix well.
3. Stir in seasoning and cheese and mix well.
4. Add dressing and mix well to coat.
5. Refrigerate for 4 hours or overnight for flavors to mingle.
6. Stir topped with chopped green onions.