Step 1

Combine the mayonnaise, smoked paprika, lemon juice and 1/2 teaspoon smoked or regular salt in a small bowl. Cover and chill until serving.

Step 2

Season prawns with the remaining salt and some pepper, then set aside. Toss avocado with olive oil and season with sea salt and black pepper. Set aside.

Step 3

Divide lettuce among 8 serving glasses. Top with avocado, cucumber and most of the spring onion. Arrange prawns on top and finish with a generous dollop of the smoky mayonnaise.

Step 4

Sprinkle prawns with remaining onion and some smoked paprika and serve.