Crispy sourdough bread layered with gooey cheese and aromatic basil pesto, creating a vibrant, flavorful grilled cheese.
2 slices rustic sourdough bread
2 tablespoons unsalted butter, softened
3 tablespoons basil pesto
1/2 cup shredded mozzarella cheese
1/4 cup shredded provolone cheese
2 tablespoons grated Parmesan cheese
Optional: 2–3 thin tomato slices
Optional: 1 tablespoon caramelized onions
Pinch of salt
Pinch of black pepper
Use medium heat to prevent burning; balance toppings to avoid soggy bread; experiment with cheese combinations or pesto variations.