Cook pasta according to package directions; drain, rinse and set aside.
Meanwhile, heat the oil in a large skillet over medium-high heat; add green onions and garlic and cook until softened.
Add tuna and Worcestershire sauce. Stir in cooked pasta. Add the shredded cheese, a little at a time, until well incorporated.
Remove from heat and allow the cheese to melt.
Add black pepper, olives, and tomatoes.
Serve.