Clean and wash the lettuce and pluck it into bite-sized pieces. Halve and core the grapes. Peel and core the pears, cut into narrow strips and turn in lemon juice. Fry the bacon on both sides over a mild heat, remove from the fat and drain on kitchen paper.
Mix the bacon fat with the two types of oil, vinegar and wine. Turn the lettuce in it and distribute it on serving plates. Turn the grapes in the remaining salad dressing, add the pears to the salad and garnish with bacon and walnuts.