Sorry, Thomson. Of course I agree that dressings are a matter of taste. Mrs Steve likes bought dressings, and I came across a really nice mustardy dressing in a bar in Andalucía this week. But, for me, I want to taste the separate ingredients of the salad and I try to buy the best quality I can find. Avocados in shops often have black bits in them, corresponding to the clumsy thumbprints of customers "checking for ripeness." I use the Galbani mozzarella, very reliable, and cherry tomatoes produced by Wim Peters in the Netherlands.