Shave fennel bulbs using the thinkkitchen Supra Mandoline. Shave Asparagus using a peeler.
Wash and tear endive heads into individual leaves.
Supreme grapefruit using sharp medium size knife, make sure there are no more seeds left.
Mix all ingredients in a salad bowl.
For the vinaigrette, mix with a whisk or an emulsion blender:
2 tablespoons of olive oil
2 tablespoons of grapefruit juice (juice from half of a grapefruit)
2 tablespoons of fresh lemon juice (juice from a whole lemon)
A pinch of salt
A pinch of pepper
Serve cold with vinaigrette folded in or on the side. Add walnuts and/or fresh mozzarella if desired. Can be served as a cold appetizer or side.