Creating Tomato Basil Rotini Pasta Salad is a simple process. Follow these steps for success:

1. Cook the Pasta: In a large pot, bring salted water to a boil. Add the rotini pasta and cook according to package instructions until al dente. Drain and rinse under cold water.

2. Prepare the Vegetables: While the pasta cooks, chop the cherry tomatoes, basil leaves, and red onion. If using, halving the mozzarella balls can be done at this time too.

3. Make the Dressing: In a small bowl, whisk together the olive oil, balsamic vinegar, garlic powder, and a pinch of salt and pepper. Adjust seasoning to your taste.

4. Combine Ingredients: In a large mixing bowl, add the cooked pasta, tomatoes, basil, red onion, and mozzarella balls. Pour in the dressing over the ingredients.

5. Toss Gently: Mix everything thoroughly so that the dressing coats each element evenly.

6. Chill the Salad: For best results, cover the salad and let it chill in the refrigerator for at least 30 minutes. This allows the flavors to combine beautifully.

7. Serve: Before serving, give it a quick toss and adjust seasoning if needed. Garnish with grated Parmesan cheese if desired.