Chop the pepper into small chunks,add into pot soften for about three minutes
Grate zucchini,squeese dry
Add to peppers cook gently for three more minutes
Add chilli flakes and salt and nuts or seeds if using
Cook pasta, Drain tip in the sauce,mix with sauce
Sprinkle with lemon zest heat for about 30 or so seconds.
Sprinkle fresh Parmesan over top
Leave to stand for a few minutes so that flavours can fuse