Put the clams in a deep frying pan and cook covered over a medium to high heat until they have opened. (about 5 minutes). Do the same for the mussels separately.
Allow the shellfish to cool a little and then remove the meat from most of the shells keeping some intact. Discard the empty shells and then filter the liquid that the clams and mussels have produced through a muslin cloth or very fine filter. Don't discard it and keep the 2 separate.
Chop the peeled garlic, the peeled shallots and the parsley finely.
Put a pot of water on to boil for the pasta. When it starts to boil add the pasta. You probably don’t need salt as the seafood will already be a little salty.
Heat the olive oil and the chopped garlic cloves and shallots in a large deep pan, add the squid, scampi and prawns and cook for 5 minutes, then sprinkle with the wine/ cognac and let the alcohol evaporate. We used cognac and flambéed it! But that is optional!
Add the tomato pulp or peeled tomatoes and cook for about 10 minutes. Add the mussels and clams (shelled and with shells) and continue cooking for 3-5 minutes. To prevent the sauce from drying out too much, add some of the previously filtered cooking juices from the clams first and then the mussels. (The clam juice tends to be more flavourful)
Preheat the oven to 200°c (about 390°F).
Cook the pasta less than or half the time for al dente according to the instructions on the packet. Then drain it.
Add the drained pasta to the pan with the sauce, mix well and place a single portion of pasta and seafood on a rectangular double sheet of baking paper or aluminum foil about 50cm long. Close each packet well and bake in your preheated oven for 8-10 minutes.
Serve your seafood linguine al cartoccio sprinkled with parsley in the individual foil packets. Of course, you could put it into a plate but half the fun is eating it out of the ‘cartoccio’. Remember to provide napkins, finger bowls and a bowl to put the shells etc.