Heat the oil in a pan.

Crush and add the garlic, then add the prawns and cook for 3 to 4 minutes, or till cooked through.

Remove from the heat and set aside.

Alternatively, you can just boil the prawns in some water.

For the Marie rose sauce, combine all the ingredients and set aside.

Shred the lettuce and place in glasses.

Add the peeled prawns, dollop with Marie rose sauce and finish with a tomato.