Potted Shrimp
Tiny brown shrimps potted in spiced butter under a clarified cap, melted out onto brown bread: the Morecambe Bay potting trade since 1799, lifted into a sandwich.
UK
Potato Bread Sandwich
Northern Irish fadge is a flat potato farl griddled cold off the board, soft inside with a chalky flour crust, and two slabs standing in for bread is the sandwich the Ulster fry is built around.
Pork Scratching Sandwich
Pork scratchings (crispy fried pork skin) on bread; pub snack as sandwich.
Pork Pie Sandwich
Sliced pork pie (pork in hot water crust pastry) on bread; picnic combination.
Pork Luncheon Meat and Salad
Luncheon meat with lettuce and tomato.
Polony Sandwich
Sliced polony (smooth pork sausage, like bologna) on bread; old-fashioned.
Poached Salmon Sandwich
Cold poached salmon with mayonnaise.
Ploughman's Sandwich
Full ploughman's components; crusty bread, cheese, pickle, onion, ham, apple.
Pitta Bread
Pitta stuffed with falafel, kebab meat, or salad.
Pilchard Sandwich
Tinned pilchards (larger sardines) on bread.
Piece
Scottish term for sandwich; 'a piece' means a sandwich.
Piece and Ham
Ham sandwich; Scottish terminology.
Pie Sandwich
Meat and potato pie in bread; Northern tradition.
Pie Barm
Meat pie inside a barm cake; famous Wigan combination, carb-on-carb-on-carb.
Peanut Butter Sandwich
Peanut butter on bread; American influence.
Peanut Butter and Jam
British version of PB&J; less common than in US.
Pâté and Cornichon (Tea)
Smooth chicken liver pâté with sliced cornichons on brown bread; French-influenced tea sandwich.
Pasty Bap
Cornish pasty in a bap; rarely done, but exists.
Pastie Bap
Northern Irish pastie (minced meat and potato in batter, fried) in a bap; chip shop specialty.
Panini
Italian-style pressed sandwich; very popular in UK cafés.
Panini with Mozzarella and Tomato
Classic Italian-style panini filling.