As usual, cook spaghetti al dente or, if you like, cook it a little softer.
Make a sauce from soy sauce, sugar, oil, lemon juice and curry powder.
Cut the peppers (preferably mixed) and spring onions into small pieces and add to the sauce. After cooking, rinse the spaghetti with plenty of cold water and mix it with the sauce.
If possible, let the salad stand for at least half an hour, stirring occasionally.