Avocado and Grapefruit Salad

2 large ripe avocados
2 grapefruit
Juice of 1 lemon
1/4 cup olive oil
Salt, to taste
Pepper, to taste

Prepare dressing with some lemon juice, olive oil, salt and pepper. Peel and slice the avocados and drop immediately into the dressing. Peel the grapefruit and remove all the pith. Divide into segments and cut each segment in half, add to the avocado and toss well. Chill and serve.