Whisk the ingredients together for the dressing.
Wash and dry the mixture of lettuces and salad leaves and tear into bite-sized pieces. Spread both sides of the rounds of bread with softened butter. Put on to a baking sheet and bake in a moderate oven, 180°C/350°F/Gas 4, until golden and crisp on both sides, for approximately 20 minutes. Rub them with a cut clove of garlic and keep hot