Fill a 5-quart saucepan with salted water. Bring the water to a boil, then add the tortellini to the boiling water. Return the water to a boil and cook according to package instructions (about 4 minutes for fresh tortellini, 20 minutes for dried tortellini). Once the tortellini floats to the top and is finished cooking, drain it but do not rinse. Then toss in your favorite sauce (like this pesto tortellini).