In a saucepan pour the juice and water and bring the mixture to a boil. Place the couscous in a pan and the Mediterranean Roasting Rub .Add the juice and water mixture to the pan and mix, leave for 30 minutes until all the liquid is absorbed by cous cous and its cooked. Put the shrimps in a bowl and marinate them with olive oil and season with salt and pepper. Put a pan on a medium-high heat and fry the shrimps for 2-3 minutes on each side. When the shrimps start to change colour add wine and continue cooking on a high heat until the alcohol evaporates. Remove from the pan and serve with couscous.