1. **Prepare the Garlic Butter**: In a small bowl, combine softened butter, minced garlic, and chopped parsley. Mix well and set aside.

2. **Cook the Shrimp**: Heat olive oil in a skillet over medium heat. Add the shrimp, season with salt, pepper, and a bit of lemon zest. Cook until pink and opaque, about 3-4 minutes. Remove from heat and set aside.

3. **Assemble the Sandwiches**: Spread the garlic butter mixture generously on one side of each bread slice. Place the bread, buttered side down, on a clean surface. Layer one half with a generous helping of cheese, followed by the cooked shrimp, and a bit more cheese. Top with the other slice of bread, buttered side up.

4. **Grill to Perfection**: Heat a skillet over medium heat and place the sandwiches in carefully. Cook until the bread is golden brown and crispy, and the cheese is melted, about 3-4 minutes per side.

5. **Serve and Enjoy**: Once grilled, remove from the heat and let them sit for a minute before slicing. This allows the cheese to set slightly and makes for easier eating.