Wash and slice the lettuce. Slice the tomatoes in half.
Prepare the cocktail sauce by mixing the ingredients together in a bowl until fully combined. Add salt and pepper to taste, plus extra tabasco and/or lemon juice as desired.
To assemble, divide the lettuce and tomatoes between four plates or glasses. Top with the prawns plus a generous spoonful of cocktail sauce.
To serve, dust with paprika and serve with a lemon wedge.
Notes
The sauce will keep in the fridge for up to 2 days. It is not suitable for freezing.