Begin by warming a large skillet over medium-high heat for about 2 minutes. Pour in 1 tablespoon of olive oil and add 2 tablespoons of unsalted butter, watching for it to shimmer.

Once the butter has melted completely, add the shelled shrimp in a single layer. Sauté for about 2-3 minutes until they turn pink and slightly opaque, showcasing their tenderness.

Carefully sprinkle some salt over the shrimp to enhance their natural flavors. This initial cooking is crucial for achieving that perfect sear that adds depth to your dish.

After the shrimp have cooked through, flip them over and continue to cook for an additional 2 minutes. Introduce the minced garlic and red pepper flakes to the skillet and stir gently for about 30 seconds.

Stir in the remaining 2 tablespoons of butter, ensuring it melts and creates a luscious sauce. Squeeze the juice of half a lemon directly into the pan and toss in the chopped parsley.

Serve immediately to savor the rich and vibrant flavors at their peak.