Cajun Boiled Shrimp - cooking recipe

Ingredients

3 to 5 lb. shrimp (raw in the shell)
1 pkg. Zatarain's seafood boil
3 to 6 ears of corn-on-the-cob, shucked and silked
6 to 12 new red or white potatoes, depending on size of potatoes, more or less may be needed (do not peel potatoes, just wash well)
1 lemon, sliced
1 medium onion, quartered and peeled
2 to 6 dashes red cayenne pepper (optional)

Preparation

Fill a large pot 1/2 to 2/3 full of water.
Start water heating.
Put the corn-on-the-cob and potatoes in hot water and cook until almost done.
Bring water to a boil.
Add onion, lemon, seafood boil and cayenne pepper.