To the same pan over medium–high heat, add the butter and some more olive oil if needed. Add the onion and cook, stirring, for 2–3 minutes. Add the garlic, bacon and mushrooms and cook, stirring, for 3–4 minutes. Add the stock and cream and whisk well. Then add the tortellini. Place the lid on, turn the heat down to medium–low and cook for 3–4 minutes.
1 tsp butter, 1 brown onion, 2 cloves garlic, 3 bacon rashers, 1 cup mushrooms, 0.5 cup chicken stock, 1 cup thickened cream, 565 g ricotta tortellini