This recipe is adapted from a Silver Palate cookbook; the main difference is that I took out the squid rings! I've been making it for 20 years. It's a delicious spring or summer dinner, and is a pretty company dish. Serve with a lettuce & tomato salad, and a loaf of crusty bread - sublime! It's easy to make, and is quick unless you have to shell the shrimp. You can use any type of pasta, but the small shells are best because when the salad gets mixed together, the peas nestle into the shells and look very cute!