Boil the rotini according to the instructions on the package. Be careful not to overcook, it is best al dente.
Once cooked, drain the pasta, rinse with cool water, and set it in the fridge to cool.
While the pasta is cooking, prepare the dressing and vegetables. Dice the bell peppers removing the stems and seeds.
Remove the ends from the cucumber, quarter it lengthwise and chop it into about ½ inch pieces. Peel and thinly slice half of a small red onion. Halve the cherry tomatoes. Stack the basil leaves, roll them, and thinly shred them.
Prepare the Creamy Balsamic Dressing according to the recipe instructions (you will need roughly the full dressing recipe yield, about 1 cup). Place the rinsed pasta in a large serving bowl. Add the peppers, cucumbers, tomatoes, onion and olives, and toss. Add the crumbled feta and shredded basil and toss gently.
Pour the Creamy Balsamic Dressing on the salad and mix well with a rubber spatula. Serve immediately or store covered in the fridge and consume within 2 days for best quality.