Cook the spaghetti al dente according to the instructions on the packet. In the meantime, rub the zest of the lemon and squeeze out the juice. Mix the zest with half the juice and the olive oil and whip the oil vigorously. Core and finely chop the peppers.
Heat a pan and add 2 spoons of the lemon olive oil and let it get hot. Heat the prawns in it, add the remaining oil, add a little salt and add the finely chopped peppers.
Drain the spaghetti and add to the pan. Mix everything well and serve immediately.