To store leftovers: Keep tortellini and soup separate when storing in the refrigerator. This keeps the pasta from drinking up the broth. When ready to re-heat, take the tortellini and soup out of the refrigerator and let come to almost room temp. At this point, reheat the soup (not the tortellini) until it is very hot almost boiling. Ladle tortellini into bowls and ladle soup over top to almost completely cover. The hot soup will warm the tortellini through.