Gather the ingredients.

Preheat the oven to 450 degrees F (230 degrees C).

Arrange shrimp in a single layer in a stoneware baking dish. Drizzle with olive oil.

Combine garlic salt, parsley, and pepper in a small bowl; sprinkle over shrimp.

Scatter butter on top of shrimp. Roast in the preheated oven, watching carefully, until shrimp is bright pink on the outside and the meat is opaque, 5 to 10 minutes.