Clean, wash and chop the lettuce and chicory. Clean, wash and quarter the tomatoes. Remove seeds, cut flesh into small cubes. Remove shavings from the cheese with a peeler. Mix oil, vinegar, mustard and 2 tablespoons of water.
Season with salt, pepper and sugar. Mix the salad ingredients with the vinaigrette. Cut toast into rhombs and fry in hot fat until golden brown. Arrange the salad on four plates, sprinkle with croutons