Conny Onny butties were a favourite of mine when I were a lad, Whether it's a Liverpudlian word I don't remember, but they were called that back in the 50's in Liverpool
Depends how I am feeling:
Brie, bacon, grapes, rocket and cranberry
Chicken, mayonnaise, sweetcorn, sundried tomatoes
Turkey, Avocado, beetroot, gherkin
Egg, cress, mayonnaise
Peanut butter and jam
Steak, horseradish and rocket