To start, fill a large pot with boiling water. It will be roughly 10 cups, depending on the size of your ingredients.
Then, add the onion and garlic to the mixture. Bring the seasoned water to a rolling boil over high heat. Add a lid to the pot to make the water boil more quickly.
Once the water comes to a boil, add the potato chunks. Leave them to cook for roughly 8 minutes. You can leave the pot uncovered and on medium-high heat.
The remaining ingredients should be added in a specific order and for specific amounts of time. So, if you are leaving out (for example) the lobster tail, you should take away the cooking time. The previously added ingredients still need it. So in this example, the potatoes will cook for 8 minutes, then another 5 minutes before you add the clams, etc.
When the potatoes have been cooking for 8 minutes, add the lobster tails. Leave them to boil for 5 minutes.
After 5 minutes, add the crabs, crab legs, clams, and pieces of corn. Stir the ingredients together well so their flavors blend. Leave these ingredients to cook for another 5 minutes.
Next, add the shrimp or prawns - whichever you choose. These should only cook for 3 minutes.
After the ingredients have fully cooked, drain the seafood boil from the water and keep it inside of the large pot.
Then, add some of your homemade Whole Shabang sauce. You can decide how much you want to add.
Stir in some butter to give the seafood boil a creamy finish.
Finally, garnish your Whole Shabang seafood boil with freshly chopped parsley and fresh lemon slices.