Cook the Pasta: Bring a large pot of salted water to a boil, add the pasta, and cook for 8-10 minutes until al dente. Stir occasionally.

Rinse and Cool the Pasta: Drain the cooked pasta, rinse under cold water for 1-2 minutes until cooled, then set aside.

Prepare the Vegetables: In a large mixing bowl, combine tomatoes, cucumber, red onion, bell pepper, and olives. Toss gently.

Whisk the Dressing: In a small bowl, mix Italian dressing, garlic powder, salt, and pepper. Optionally add lemon juice.

Combine Pasta and Veggies: Add cooled pasta to the vegetables, drizzle dressing, and toss until evenly coated.

Chill and Serve: Cover and refrigerate for at least 30 minutes before serving.