Prepare tortellini according to package directions for al dente texture. Typically, this means boiling pasta for about 5 minutes.
Rinse the tortellini under cool water to help stop the pasta cooking and to maintain ideal doneness for a pasta salad. Drain.
In a large bowl, combine the tortellini and ½ cup of the italian dressing. Stir until evenly coated.
Add the remaining ingredients and stir until evenly distributed.
Chill covered for at least one hour, then top with remaining ½ cup Italian dressing and fresh basil and serve.
