Heat a large skillet over medium-high heat. Add half of the butter and swirl around to coat the bottom of the pan.

Spread remaining butter on one side of each slide of bread.

Top one slice of bread with a slice of cheese then add a few tablespoons of olive salad.

Add another slice of cheese and the remaining slice of bread.

Transfer to the pan and cook on one side until golden brown.

Flip carefully and cook until other side is golden brown and the cheese has melted.

Let rest a few minutes before slicing and serving.