Good Ole' Southern Frogmore Stew

Ingredients

• 3 quarts water
• 1 lemon halved
• 1 onion medium, halved
• 2 cloves garlic smashed
• coarse salt to taste
• 3 ounces crab boil
• 1 1/2 pounds red potatoes medium, scrubbed
• 1 pound smoked sausage cut into 1 inch pieces
• 4 ears fresh corn shucked and broken in half
• 1 1/2 pounds shrimp unpeeled, large fresh
• 1/2 cup butter melted