Lunch

Prawn Cocktail Sandwich

Name: Prawn Cocktail Sandwich
Prep time: 10 min
Total time: 10 min
Yield: 1 serving
Ingredients: 120 g Cooked prawns, peeled; 1 tbsp (15 g) Light mayonnaise; 2 tsp (10 g) Tomato ketchup; A squeeze Lemon juice; A pinch Paprika; 2 slices, about 80 g Wholemeal bread; 40 g Little gem lettuce; 40 g Cucumber; To taste Black pepper

Cold prawns in a marie rose of light mayonnaise, ketchup, lemon and paprika, on wholemeal with shredded lettuce and cucumber. 33 g of protein for 345 kcal.

Calories: 345kcal
Protein: 33g
Fat: 7g
Carbs: 36g

Per serving, makes 1. 10 minutes of work. Published 8 September 2026.

Allergens

Gluten
Eggs
Crustaceans
Mustard

Supermarket loaves often contain soya flour. Check the bag.

Flags follow UK labelling rules and come from the ingredients as listed, not from any particular brand. Check the packet before cooking for somebody with an allergy.

Ingredients

Cooked prawns, peeled120 g
Drained and patted dry with kitchen paper, or the sauce turns watery. Cooked weight, as sold chilled.
Light mayonnaise1 tbsp (15 g)
Tomato ketchup2 tsp (10 g)
Lemon juiceA squeeze
PaprikaA pinch
Wholemeal bread2 slices, about 80 g
Little gem lettuce40 g
Cucumber40 g
Black pepperTo taste

Method

Stir the mayonnaise, ketchup, lemon, paprika and pepper into a sauce. Fold the prawns through.
Shred the lettuce and slice the cucumber thinly.
Lay the lettuce over one slice of bread, spoon the prawns on, add the cucumber and close. Cut in half and eat straight away.

Worth knowing

Marie rose sauce is mostly mayonnaise. Using the light one and only a tablespoon is how a prawn cocktail becomes a 345 kcal sandwich.
Cooked prawns are 20 g of protein per 100 g and under 1% fat. They are doing all the work here.

Other lunch recipes that share ingredients with this one, or every lunch between 300 and 450 calories a serving.

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Macros are calculated from the weights listed above using standard food composition values, and will shift with your own brands and measuring. Weigh what you can. This is a recipe, not dietary advice. The full health disclaimer is below.