Making the Spinach and Feta Grilled Cheese is straightforward. Just follow these steps:

1. Preheat the Pan: Heat a non-stick skillet over medium heat. Add olive oil or butter.
2. Prepare the Filling: In a bowl, mix chopped spinach, crumbled feta, salt, and pepper.
3. Assemble the Sandwich: Place one slice of bread in the skillet. Top it with the spinach-feta mixture, spreading evenly.
4. Cover with Bread: Place the second slice of bread on top of the mixture.
5. Grill One Side: Cook for about 3-4 minutes on medium heat or until the bottom slice is golden brown and crispy.
6. Flip the Sandwich: Carefully flip the sandwich using a spatula. Cook for another 3-4 minutes, pressing down gently to ensure even grilling.
7. Check for Melted Cheese: Continue to cook until the feta is warm and slightly melted.
8. Remove and Cool: Once both sides are golden and the filling is warmed through, remove the sandwich from the skillet.
9. Slice and Serve: Cut the grilled cheese in half and serve hot.

These simple but effective steps will guide you to create this amazing twist on a classic favorite in no time!