One pot, twenty five minutes. Dice the onion, chop the garlic, slip the salsiccia out of its skin. Break the sausage into a large pot over medium heat and fry about five minutes until browned. Add the onion and garlic and cook until fragrant. Stir in the tomato paste, herbs and chilli flakes and fry two minutes until the paste darkens. Deglaze with the stock, bring to a boil, then cook the tortellini in it as the pack says. Stir through the cream and spinach, bubble briefly, season and serve.