Break the spaghetti 3 to 4 times before cooking. Cook “al dente” in salted water as usual.
Core and roughly chop the peppers. In the Quickchef, use the knife insert to finely chop or cut very finely. Also cut the feta cheese into coarse pieces and then finely chop in the Quickchef or chop it as finely as possible.
Mix the salad dressing according to the instructions on the packet. Mix the cooked pasta with all the ingredients and let it steep for at least 6 hours.