In Maryland, we eat steamed crabs on Memorial day.
1. Buy a dozen or two blue crabs (females will probably still have roe)
2. Get a steamer pot and fill w/ two 12oz cans of bud and equal amount white vinegar with half cup of water.
3. Layer crabs in the steamer pot; put a healthy sprinkling (or shitload) of Old Bay spice between each of them.
4. Get the steamer pot boiling first, then add the top part of the steamer (w/ the crabs) on and wait ~15-20 minutes (look for the orange-red color).
Serve w/ cheap beer or white wine.