Gather your equipment: a medium skillet, a spatula, and a sturdy cutting board. Begin heating the skillet over medium heat. Let the burrata cheese come to room temperature.

Evenly spread a generous layer of butter on one side of each slice of bread.

Place a slice of the buttered bread, buttered side down, onto the skillet. Spread a thin layer of spinach pesto, then add pieces of burrata cheese.

Top with the second slice of bread, buttered side up. Press down gently with a spatula.

Cook for about 3-4 minutes until the bottom turns golden brown. Flip the sandwich and cook for another 3-4 minutes.

Once both sides are golden and crisp, remove from skillet and let cool for a minute before slicing in half.