01 -
Heat a skillet or griddle over medium heat until evenly hot to ensure uniform toasting of the bread.
02 -
Spread softened butter evenly on one side of each slice of bread to achieve a golden, crisp exterior during grilling.
03 -
Combine ricotta, shredded mozzarella, and grated Parmesan in a bowl until thoroughly blended to create a creamy cheese mixture.
04 -
Place two bread slices buttered side down on the skillet, spread the cheese mixture evenly, then layer with chopped sun-dried tomatoes and fresh spinach leaves. Top with the remaining slices, buttered side up.
05 -
Grill each sandwich for 3 to 4 minutes per side over medium heat, until bread is golden brown and cheese is fully melted. Flip carefully to maintain sandwich integrity.
06 -
Remove sandwiches from the skillet and let rest briefly before cutting to allow the cheese to set slightly, preventing spillage.