Tomato, Watercress and Avocado Salad with Crispy Bacon Dressing

This salad, padded out with shredded lettuce, is the ace favourite choice for lunch during the summer holidays with all the members of our family. Whenever I am racking my brains and ask what shall we have for lunch, the unanimous answer is tomato, watercress and avocado salad, with the bacon dressing. I really think they would eat it every day for a week if I let them! I like to serve it with warm brown rolls, or the granary bread which we make each day for our guests here at Kinloch.