1.Cook tortellini in a saucepan of boiling salted water, 3 minutes, or until tortellini floats to the surface. Drain, reserving 3/4 cup of cooking liquid. Stir crumbled stock cube into reserved cooking liquid to dissolve.
2.Heat a deep frying pan over moderate heat. Add sun-dried tomato, cook and stir, 1 minute, or until softened slightly.
3.Stir in stock and cream. Bring to a simmer. Whisk in tomato paste, simmer uncovered, 4 minutes, or until reduced slightly.
4.Add parmesan and spinach, simmer, 1 minute, or until spinach wilts. Season.
5.Add pasta to pan, stir gently to coat. Divide pasta mixture among serving bowls. Serve topped with shaved parmesan.