Preheat the barbecue and place the grill about 4 to 6 inches above the heat source so you can cook these parcels on a medium to high heat.
Whilst the barbecue is heating up place half the shrimps on a piece of aluminum foil with the nonstick (dull) side facing up towards the food.
Then around this arrange half the rice and sprinkle it and the shrimps with some of the seafood seasoning before then topping off the shrimps with half the minced garlic.
Then place half the broccoli on top of the shrimp and sprinkle with garlic and butter.
Do the same for the other parcel and then top each one off with 4 ice cubes.
Now bring the sides of the aluminum foil up and double fold over the top and at one end.
At the end, which is still open, pour in half the water and then fold this end over so that the ingredients are now sealed inside.
Make sure that you use a large enough piece of foil to allow room for heat and steam to circulate inside.
Once the parcels are ready place on the barbecue and let them cook for 9 to 13 minutes.
It is important that you close the lid whilst the parcels are cooking to ensure that things cook evenly.
After removing from the grill snip open the parcels and stir the rice before you then serve as they are to your guests.
It is also a good idea to squeeze some fresh lemon juice over the shrimps, rice and broccoli just before serving.