Creating this flavorful Sheet Pan Shrimp Boil is straightforward and involves just a few simple steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
2. Prepare Potatoes: In a large bowl, combine the halved or quartered potatoes with 2 tablespoons of olive oil, Old Bay seasoning, garlic powder, paprika, onion powder, salt, and pepper. Toss until well coated.
3. Add Sausage: Incorporate the sliced sausage into the potato mixture, tossing again to ensure everything is evenly seasoned.
4. Spread on Sheet: Transfer the potato and sausage mixture to the prepared baking sheet, spreading it out in an even layer.
5. Roast Vegetables: Bake in the preheated oven for about 15 minutes.
6. Prepare Shrimp and Corn: While the potatoes and sausage are roasting, in a separate bowl, toss the shrimp and corn with the remaining 2 tablespoons of olive oil and a pinch of salt and pepper.
7. Add Shrimp and Corn: After 15 minutes, remove the baking sheet from the oven. Carefully add the shrimp and corn to the pan, arranging them evenly.
8. Return to Oven: Place the sheet back in the oven and cook for an additional 10-15 minutes, or until the shrimp are pink and cooked through.
9. Garnish: Remove from the oven, squeeze fresh lemon juice over the top, and sprinkle with chopped parsley.
10. Serve: Allow to cool for a few minutes, then serve warm, directly from the baking sheet for a rustic presentation.

Following these steps will yield a scrumptious Sheet Pan Shrimp Boil that your friends and family will love!