Preheat grill over high heat.
Wash and prepare vegetables, slice sausages.
Cut 4, 12 inch pieces of foil.
Divide shrimp, garlic, corn, sausage and potatoes evenly between the 4 pieces of foil.
Drizzle each packet with ½ tablespoon of olive oil.
Add old bay seasoning, and salt and pepper to taste.
Gently toss to combine.
Add a slice of lemon to each packet.
Fold foil to completely cover contents, rolling the edges to create a seal.
Place foil packets on the grill and cook until potatoes are tender, roughly 10-15 minutes.
Serve immediately with additional lemon, and chopped parsley.