Put a little olive oil in the bottom of your salad bowl.
Squeeze in a clove of garlic. Sprinkle in salt and pepper. Mix.
Wash lettuce or spinach, spin dry and add to bowl tossing the greens so they get evenly coated with oil.
Cut a grapefruit in half and cut out half-sections with a grapefruit knife. Add them to salad along with the juice from the grapefruit.
Peel and cube an avocado and add to salad.
Toss and serve.