Grapefruit and Spinach Salad

Small bag of salad spinach (320g)
2 red grapefruit
Parmesan cheese either in a piece or flakes

Dressing
2 tbs balsamic vinegar
2 tsp honey
1/3 cup olive or sunflower oil
1/2 course ground pepper
1 clove of garlic

Using a serrated knife cut the top and bottom off the grapefruit then cut off the rest of the peel and all white pith. then cut out the segments. Cut over a bowl to catch the juices.
Mix the spinach leaves with the grapefruit.
Put all the dressing ingredients into a container with the juice of the grapefruit and using a had held blender (or food processor) puree until everything is incorporated.
Pour over the spinach and toss until all the leaves are coated.
Using a potato peeler flake the Parmesan cheese over the top of the salad.