Dinner

Open Prawn Cocktail Sandwich Recipe

ByBen Miller November 24, 2025November 24, 2025

Introduction

This open prawn cocktail sandwich is a fresh and flavorful twist on a classic favorite. Quick to prepare and packed with vibrant ingredients, it makes a perfect light lunch or simple dinner.

The image shows an open-faced sandwich on a white plate, placed on a white marbled surface with a light blue and white cloth underneath. The sandwich has three main layers: at the bottom is a thick slice of crusty bread with a rough texture and light brown color; on top of the bread is a layer of fresh green arugula leaves; the top layer is a mix of small pink shrimp, halved cherry tomatoes with bright red color, and diced green cucumbers, garnished with some fresh dill. There is a lemon wedge placed on the plate near the sandwich, adding a touch of yellow to the composition. The background is blurred with mostly white tones, and the overall lighting is bright and natural. photo taken with an iphone --ar 4:5 --v 7

Ingredients

2 tbsp extra-light mayonnaise
1 tbsp reduced-sugar ketchup
2 tbsp chopped dill
1 lemon, cut into 8 wedges
100g pack cooked and peeled North Atlantic prawns
½ cucumber, deseeded and diced
2 handfuls cherry tomatoes, halved
20g bag rocket
2 slices wholemeal bread

Instructions

Step 1: In a medium bowl, mix together the extra-light mayonnaise, reduced-sugar ketchup, half of the chopped dill, juice from 4 lemon wedges, and seasoning to taste.
Step 2: Add the cooked prawns, diced cucumber, and halved cherry tomatoes to the dressing and gently toss to combine.
Step 3: Arrange the slices of wholemeal bread on two plates and layer each with a handful of rocket.
Step 4: Pile the prawn and vegetable mixture evenly on top of the rocket on each slice of bread.
Step 5: Scatter the remaining dill over the sandwiches and serve with the remaining lemon wedges for squeezing over just before eating.

Tips & Variations

For a creamier texture, substitute half of the mayonnaise with Greek yogurt.
Try adding a pinch of smoked paprika to the dressing for a subtle smoky flavor.
Use gluten-free bread to make this dish suitable for gluten intolerances.
Fresh dill is best for garnish, but dried dill can be used if fresh is not available—use less as it has a stronger flavor.

Storage

These sandwiches are best enjoyed immediately to keep the bread from becoming soggy. If you need to store the prawn mixture, keep it in an airtight container in the refrigerator for up to 24 hours. Assemble the sandwich just before serving and squeeze fresh lemon juice over then.