- Cook the tortellini in salted boiling water to al dente. Use the package instructions to determine the cooking time. Rinse the cooked tortellini under cold running water to cool. Drain completely.
- While the tortellini is cooking, prepare your ingredients. Cut the tomatoes in halves or quarters*. Thinly slice the basil leaves. Measure out your olive oil, vinegar, and salt.
- Add the drained and cooled tortellini to a large bowl. Add the mozzarella, basil, olive oil, vinegar, and kosher salt to a large bowl. Stir to combine everything. Be careful not to break the tortellini. Add salt and pepper to taste.
- Allow to sit at room temperature for a few minutes. This will give the tomatoes and tortellini time to marinate in the balsamic dressing. Stir again before serving.
Refrigerate leftovers for up to 3 days.