First, cook the tortellini according to the package directions. Then drain well and cool in a very large bowl in the fridge.
While the tortellini is cooking, slice the summer squash and the zucchini into 1/4-inch rounds and then quarter the rounds. Add them to a large bowl and sprinkle with salt and mix.
Slice the cherry tomatoes in half. Slice the red onion in 1/4 inch half moons and soak it in cold water to dull its sharp flavor. Chop the parsley, and if the baby spinach leaves are large, chop them as well.
Once the tortellini has cooled, top it with the cherry tomatoes, red onion, zucchini, squash, baby spinach, and sliced black olives. Then drizzle with 1/2 cup of Italian dressing.
Next, top the salad with chopped Italian parsley and Parmesan cheese. Then drizzle with the final 1/4 cup of Italian dressing. Finally, mix, and serve! Wasn't that easy?