additional fresh basil and cilantro for sprinkling
Preheat oven to 425 degrees F.
Combine butter, basil and 1/4 teaspoon salt together in a small bowl, mixing to combine. Place butter on a piece of plastic wrap, shaping it into a ball or a log and wrapping it up. Set in the fridge to harden.
Add shrimp to a large baking dish. Cover in salt, pepper and olive oil, tossing to coat. Roast for 10-12 minutes (or longer or shorter for the size of your shrimp, I actually roasted mine for 15 minutes because they were super jumbo. Just keep an eye on them and the minute they are pink, remove from the oven.) then remove and slice basil butter over top. Cover in parmesan and another sprinkling of herbs, then serve immediately.