This is my favorite cold noodle salad! I loved it so much, we made mass quantities for my wedding. There are some similar recipes out there, but after testing over and over, here is the combination that I think works best. I kept the recipe vegetarian, but I usually add cooked bay shrimp. You can add any kind of meat or veggies!! You can also omit or add more of the cayenne depending on your "spicy tolerance"! You can certainly substitute spaghetti for the Soba noodles, but Soba noodles really work best.