Heat up a frying pan and then squirt with a couple of sprays of one-calorie oil spray. Add the onions, peppers and the garlic and gently fry until soft.
Add a few more sprays of the oil spray and add the mushrooms. Cook until the mushrooms have softened and started to brown off.
Meanwhile, cook your spaghetti according to the packet instructions.
When the mushrooms are cooked through, add the soft cheese. Stir everything together, adding milk to loosen the sauce a little. Add 1 tbsp of parmesan and stir in. Season with freshly ground black pepper.
Drain the spaghetti - reserving a little of the cooking liquid, which can be used to loosen up the sauce some more if you wish.
Divide the spaghetti and sauce between two serving plates. Sprinkle with chives, more black pepper and ½ tbsp of parmesan.