2 tablespoons crab boil seasoning per gallon water (or more to taste)
several lemons, halved (optional)
redskin potatoes (depending on size, 3 or more per person)
spicy smoked sausage, cut into 1-inch slices (1/4 pound per person)
fresh corn, broken into halves or thirds (1 1/2 ears per person)
shrimp (1/2 pound per person)
Fill a large steamer pot halfway with water. Add crab-boil seasoning (or more to taste). Several halved lemons may be added as well.
When the seasoned water comes to a boil, add redskin potatoes and boil for 20 minutes; then add one-inch slices of spicy smoked sausage and boil for 5-10 minutes. Add the corn) and boil another 5 minutes. (Begin timing immediately. Do not wait for it to boil again). Then add the shrimp. Cook for 3 minutes, drain, and pile on a table.
Serve with lots of paper towels and icy beverages, plus melted butter for the corn, cocktail sauce for the shrimp, and sour cream or ketchup for the potatoes.