Portuguese New England Style Boil
3 cloves garlic, peeled and lightly crushed
Half of a small onion, diced
3 tbsp. butter
3 tbsp. vegetable oil
4-6 medium yellow potatoes, halved
4-6 ears sweet corn, husked and broken in half
1lb. chouriço (chorizo) or linguicia sausage, cut into small bits
2-3 lbs littleneck, cherrystone, or top neck hard shell clams
1-2 lbs raw shrimp, rinsed and peeled, if desired
1 can light beer such as Budweiser
Salt
Rinse the clams in cold water and gently scrub their shells, discarding those that are broken or do not close when lightly tapped on the counter. Set a large pot over low heat and add oil and butter, then the garlic. Once the garlic is fragrant and starting to brown, increase the heat to medium and add the sausage, cooking until lightly brown. Add the beer and then water as needed to bring the liquid to 3-4 inches. Add the potatoes to the bottom of the pot.
Cover and bring to a steady simmer, then cook the potatoes for 5 minutes. Add the clams and cover, cook 5 minutes more, then add the shrimp and corn and cover. Check the pot; in the next 3-4 minutes the clams will have opened their shells. Take the pot off the heat and let sit 10-15 minutes, leaving covered, then serve.
You will have adjust the timing depending upon the size of your clams, potatoes, corn, and shrimp. The clams are done when they're open, and they can take a little overcooking if you need it to finish the shrimp. The shrimp are done as soon as they're pink, and will be very unpalatable if overcooked.
Some of you will want to add some Old Bay, and that's OK, though I don't. I do a separate pot for lobster or crabs, cooking both in sea or heavily salted water. I add crushed red pepper to the crabs.