Roast your own chicken breast or buy a roast chicken and remove chicken breast. Pop in a food processor with 4 table spoons of whole egg mayo 1 tablespoon of chopped celery, a squeeze of lemon juice, 1 tablespoon of shallots, and some grated apple.
Mix till it is a firm paste.
Pop on a crusty roll with some sliced apple and walnuts, salt an pepper and you are done.
Optional add some rocket or spinach leaves.
Make 4 baguettes