In large bowl, combine shrimp, 2 tablespoons of olive oil or melted butter, garlic, lemon zest, crushed red pepper, and salt.
Let marinate for 2 hours, up to overnight.
In large skillet, add remaining tablespoon of olive oil or butter over medium-high heat.
Once hot, add shrimp.
Cook 3-4 minutes on each side, until shrimp is white and no longer translucent.
Once cooked, remove from heat.
Top with fresh squeeze of lemon juice and fresh parsley.
Enjoy!