Cook the tortellini following the package instructions, then allow it to cool.
In a large bowl, combine the cooled tortellini with tomatoes, olives, onion, red bell pepper, and green bell pepper.
Drizzle Italian dressing over the mixture until it reaches your preferred moisture level.
Season with salt and pepper to taste, and then toss the salad.
Refrigerate for 1-2 hours before serving to enhance the flavors.