Preheat the oven to 350°F (175°C).
In a mixing bowl or directly in an oven-safe baking dish, whisk together the melted butter, lemon juice, Italian seasoning, and Italian dressing mix until smooth.
Add the uncooked, peeled shrimp to the baking dish and toss or stir so each piece is well coated in the buttery seasoning mixture.
Place the baking dish in the preheated oven and bake until the shrimp are pink and opaque, about 15 minutes.
While the shrimp bakes, cook the pasta in a saucepan according to the package instructions until al dente, then drain in a colander.
Divide the drained pasta among plates or a serving platter, top with the baked shrimp, and spoon any sauce from the baking dish over the pasta.
Garnish with the chopped fresh parsley and serve immediately.