Best Pesto Grilled Cheese features golden crisp bread layered with basil pesto and melted cheese for a rich and flavorful sandwich.
4 slices sourdough bread
4 tablespoons basil pesto
4 slices mozzarella cheese
2 slices provolone cheese
2 tablespoons unsalted butter softened
1 tablespoon grated Parmesan optional
Spread pesto evenly on one side of each bread slice.
Layer mozzarella provolone and optional Parmesan on one slice and top with second slice pesto side down.
Butter outer sides of sandwich evenly.
Heat skillet over medium low and cook sandwich 3 to 4 minutes per side until golden and cheese melts.
Rest briefly then slice and serve.
Cook over medium low heat for even melting. Avoid overfilling with pesto to prevent sogginess.