01 -
Preheat a medium skillet over medium heat and add olive oil, swirling to coat the surface evenly.
02 -
Spread the ricotta cheese evenly over one slice of bread. Layer chopped sun-dried tomatoes, fresh spinach leaves, salt, pepper, and grated Parmesan cheese on top of the ricotta.
03 -
Place the second slice of bread over the fillings, pressing gently to seal.
04 -
Transfer the assembled sandwich to the hot skillet. Cook until the bread is golden brown and crisp, about 3 to 4 minutes per side, pressing occasionally with a spatula for even toasting.
05 -
Remove the grilled sandwich from the skillet. Cut in half and serve immediately while warm.