The sauce is mixed with the cooked pasta and I added a few torn basil leaves (the recipe said to cook the tomatoes with dried basil, but we didn't have any) and a drizzle of olive oil.
The dish was lovely. One of my favourites actually. And I will be making it again and again. If I can find crayfish tails that is. The guys at The Recipe Chef commented about the meatiness of the crayfish tails compared to prawns, but I've previously not had the opportunity to actually compare them in the same dish I didn't really expect much meatiness to be obvious, but there was quite a big difference. The crayfish also added so much more of a lovely fishy flavour to the dish.
Perhaps I've not been looking that closely, but it doesn't seem that our supermarkets have any crayfish, and with the absence of any fishmonger that I can see in the area, my hunt may be a long one.