Start with four slices of sourdough bread. Pour yourself a cup of coffee because we’re about to embark on a sandwich-making journey. Spread a tablespoon of softened butter on one side of each slice. This butter will work its magic in the skillet later.

Now, layer the cheese. On the unbuttered side of two slices, place one slice of mozzarella and one slice of white cheddar. Spread the pesto on top of the cheese. Don't skip this step—it adds an incredible dimension. Sprinkle a dash of garlic powder over the cheese for an extra punch of flavor.

Cover the cheese with the other two slices of bread, ensuring the buttered sides are facing outward. This will help achieve that golden crust we’re aiming for.

Heat a non-stick skillet over medium heat. Once it’s hot, carefully place your sandwich in the skillet. Press down gently with a spatula.

Let it cook for about 4 minutes or until the bread has turned golden brown. Don’t rush this period; patience is key here.

Now comes the exciting part—flip the sandwich carefully. I tend to use my spatula to make a swift movement here. Cook the other side for another 4 minutes, ensuring the cheese melts and everything comes together.

Once both sides are crispy and golden, remove the sandwich from the heat. Let it rest for a minute before cutting it in half. That way, the scrumptious cheese won’t ooze out too quickly.

Plate your masterpiece and get ready to dive into the incredible tastes you’ve just created.