In a medium bowl, combine shrimp, lemon zest, juice of 1 lemon, salt, pepper, and minced garlic. Allow shrimp to marinate for 15-20 minutes in the fridge. 

Pre-heat oven to 375 degrees.

Oven safe skillet, heat over medium high heat. Once butter had melted, add juice of a lemon. Add the shrimp in one flat layer to skillet. 

Cook about one minute per side. Flip shrimp and move to oven for 7-8 minutes. 

Remove from oven and top with chopped parsley and lemon rounds if desire. Serve immediately.