Prepare the Shrimp:
In a large skillet, heat the olive oil over medium heat. Add the shrimp and cook for 2-3 minutes per side until pink and fully cooked. Remove from the skillet and set aside.

Cook the Vegetables:
In the same skillet, add the chopped onion, garlic, and bell pepper (if using). Sauté for 3-4 minutes until softened.

Make the Filling:
In a medium bowl, whisk together the heavy cream, eggs, mayonnaise, lemon juice, Old Bay seasoning, smoked paprika, salt, and pepper. Once the shrimp has cooled, chop them into bite-sized pieces and add them to the mixture along with the sautéed vegetables. Stir to combine.

Assemble the Pie:
Preheat the oven to 375°F (190°C). Roll out the pie crust and fit it into a 9-inch pie dish. Pour the shrimp filling into the prepared crust and spread it evenly. If desired, sprinkle shredded cheddar cheese on top for extra flavor.

Bake:
Bake for 30-35 minutes or until the filling is set, the edges of the crust are golden, and the top is lightly browned.

Garnish and Serve:
Once the pie is done, remove it from the oven and let it cool for 10 minutes before slicing. Garnish with fresh chopped parsley and serve warm.