Heat the olive oil in a large pan and add the onions and sage and preserved lemon. Cook on a medium heat for 10 - 15 minutes until the onions are brown, thick and sticky.
While the onions are cooking heat a large pan of water salted with sea salt and a little olive oil added. Cook the pasta for 15 minutes or until al dente.
Drain the pasta leaving a small amount of the cooking water in it.
Toss the caramelised onion through the pasta and top with goat's cheese and some fresh sage leaves. Season with cracked black pepper.
Serve with a dark green leaf salad.
Note: Onions contain sulphide compounds and other natural chemicals which can help to lower high blood sugar levels to a similar extent as prescription drugs used to treat type 2 diabetes.